For a dog that needs to gain weight, I’d start by asking a veterinarian why the weight is low, then choose a calorie-dense food or supplement that fits the dog’s appetite and routine. PetAg Dyne High-Calorie Liquid Nutritional Supplement is my best overall pick in this lineup for its straightforward liquid format and availability in several sizes; Under the Weather Ready Cal Gel stands out for convenient, concentrated portions, while Solid Gold Chicken & Liver Wet Dog Food is the food-based choice for dogs that prefer a meal over a supplement. The main tradeoffs are format, serving flexibility, ingredient preferences, and whether a product is meant to supplement or replace food. Continue reading for the full breakdown and help matching an option to your dog’s needs.
Get pet supplies delivered free with Prime
- Fast, free delivery on millions of items
- Prime Video, Amazon Music and more included
- Member-only deals all year
Complete the kit
Key Takeaways
- PetAg Dyne appears in several sizes and listings, including a gallon and multiple 16-ounce entries; compare the exact package rather than treating these as different formulas.
- Liquids and gels prioritize easy portioning, while powders and chews may suit owners who want a different way to add a supplement to a feeding routine.
- Solid Gold Chicken & Liver is the food-format pick, a meaningful distinction for dogs that resist supplements or need a meal option rather than a topper.
- Several products are calorie supplements, not complete meals; a higher-calorie add-on does not replace a balanced diet or a veterinary plan.
- Muscle-support claims do not establish that a product is right for weight gain; check intended use, calories per serving, and suitability with your veterinarian.
| dog food to gain weight | Form | Flavor | Brand |
|---|---|---|---|
| Under the Weather Ready Cal Hi | Gel | — | — |
| PetAg Dyne High Calorie Liquid | Liquid | Sweet vanilla in description; unflavored in specifications | — |
| YWUJID Dog Muscle Gain and Wei | Chewable | Chicken in title; salmon also mentioned in description | — |
| Dog Weight Gainer Liquid Food | Liquid | Salmon | — |
| Miracle Vet High-Calorie Weigh | Liquid gel | Beef | — |
| ZENO Weight Gain and Muscle Su | Chews | Chicken | ZENO |
| All American Canine Dog Weight | Powder | — | All American Canine |
| PetAg Dyne High-Calorie Liquid | Liquid | Conflicting listing details: unflavored in specifications; sweet vanilla in title and description | PetAg |
| Weight Gain Chews for Dogs | Chews | Chicken | OKKÖBI |
| PetAg Dyne High-Calorie Liquid | Liquid | Sweet vanilla in title; unflavored in specifications | PetAg |
| Pet Care Sciences Dog Weight G | Powder | Sweet bacon | — |
| Under the Weather Ready Cal Po | Powder | Chicken | — |
| PetAg Dyne High-Calorie Liquid | Liquid | Sweet vanilla in title; flavorless in specifications | PetAg |
| Solid Gold Chicken & Liver Wet | Pate | Chicken & liver | Solid Gold |
More Details on Our Top Picks
Under the Weather Ready Cal High-Calorie Supplement Gel for Dogs, 100 cc
I’d choose Ready Cal when a dog needs a calorie supplement and the caregiver wants more control over each serving. Its dial-a-dose tube sets it apart from the large PetAg Dyne gallon, which is better suited to frequent use across a household or working-dog routine. This gel is formulated with carbohydrates, omega fatty acids, 10 vitamins and 7 minerals, so it adds nutritional components as well as calories. The small 100 cc tube is easier to store and portion, though it offers far less product than Dyne’s 128-fluid-ounce container. Ready Cal is a supplement, not a complete diet, and the supplied details don’t include dosage instructions; I’d check the label or ask a veterinarian before feeding it, especially to a dog with a medical cause for low weight.
Pros:- Dial-a-dose tube supports controlled portioning.
- Includes carbohydrates, omega fatty acids, 10 vitamins, and 7 minerals.
- Compact 100 cc size is easier to store than PetAg Dyne’s gallon container.
- Made in the USA without artificial flavors or dyes.
Cons:- Intended as supplemental feeding, not a complete food.
- Supplied product details do not state dosage instructions.
- The 100 cc tube holds much less than the large-volume liquid alternatives.
Best for: Caregivers of dogs needing a portionable calorie supplement in a compact tube, particularly when measured servings matter more than bulk capacity.
Not ideal for: Households that need a complete food, a large ongoing supply, or clear dosage guidance in the product details.
- Form:Gel
- Volume:3.38 fluid ounces (100 cc)
- Item weight:3.5 ounces
- Target species:Dogs
- Vitamins:10
- Minerals:7
- Shelf life:24 months from manufacturing date
- Notable feature:Dial-a-dose tube
Our verdict“Choose Ready Cal if you want a compact gel with a portioning mechanism, but confirm feeding directions and use it alongside a complete diet.”
PetAg Dyne High Calorie Liquid Nutritional Supplement for Dogs & Puppies 8 Weeks and Older, 1 Gallon
For caregivers who expect to supplement regularly, PetAg Dyne’s 128-fluid-ounce container offers a different kind of practicality from the small Ready Cal tube: it is built around a large supply of concentrated liquid calories. The product is described for active, working, pregnant, lactating, senior, underweight, and puppy dogs from eight weeks old, giving it a broader stated use range than the dog-only supplements in this group. Its low-volume format may help add energy without taking up much stomach capacity, but it is still a supplement rather than a complete food. The listing calls the flavor sweet vanilla while the specs say unflavored, so flavor information is inconsistent. I’d also be cautious with its high-fat profile for dogs that should not gain weight, and the liquid can spill if handled carelessly.
Pros:- 128-fluid-ounce supply suits repeated or multi-dog use.
- Concentrated liquid adds calories without taking up much stomach space.
- Described for several life stages and needs, including puppies from eight weeks and working dogs.
- Can be poured over food or served on its own.
Cons:- High fat content may not suit dogs that need to limit fat or avoid excess weight gain.
- The gallon container takes substantial storage space and is less convenient than Ready Cal’s tube.
- Flavor information conflicts between the description and specifications.
Best for: Owners of active or underweight dogs who need a large supply of concentrated liquid supplement for repeated feeding.
Not ideal for: Caregivers of dogs with fat-sensitive dietary needs, those who need a small container, or buyers who require consistent flavor details before purchase.
- Form:Liquid
- Volume:128 fluid ounces (1 gallon)
- Item weight:8 pounds
- Age range:Dogs and puppies 8 weeks and older
- Intended use:Energy, performance, and endurance support
- Flavor:Sweet vanilla in description; unflavored in specifications
- Feeding method:Serve on food or on its own
Our verdict“Pick the gallon Dyne when you need a high-volume liquid calorie supplement, provided its fat content and flavor details fit your dog.”
YWUJID Dog Muscle Gain and Weight Gainer Chews, Chicken Flavor
YWUJID takes a different route from calorie-first liquids like PetAg Dyne: its soft chews combine whey protein, omega-3, amino acids, and vitamins and are positioned around muscle growth and recovery as well as weight gain. That may appeal to owners looking for a chew format rather than a gel or food topper, particularly when a dog is reluctant to take supplements mixed into meals. But the supplied information gives neither a calorie amount nor a serving dose, making it harder to judge how much weight-gain support each chew contributes. The flavor details also conflict: the title says chicken, while the description mentions salmon. Compared with Ready Cal, this has a more explicit muscle-support focus, but less clear feeding information. I’d treat its claims as supplemental, not a substitute for an appropriate complete diet or veterinary advice.
Pros:- Soft chew format may suit dogs that resist liquid or gel supplements.
- Includes whey protein, omega-3, amino acids, and vitamins B12, B2, and D3.
- Specifically positioned for muscle growth, strength, and recovery.
- Listed for dogs of all breeds and life stages.
Cons:- No calorie amount or dosage is provided in the supplied details.
- Flavor information conflicts between chicken and salmon.
- Compared with PetAg Dyne, the calorie contribution is less clearly quantified.
Best for: Owners seeking a soft-chew supplement with protein and amino-acid ingredients for a dog whose weight plan also emphasizes muscle support.
Not ideal for: Buyers who need a stated calorie count, precise feeding directions, or reliable flavor information before choosing a supplement.
- Form:Chewable
- Flavor:Chicken in title; salmon also mentioned in description
- Age range:All life stages
- Target species:Dogs
- Special ingredients:Whey protein, omega-3, amino acids, vitamins B12, B2, and D3
- Stated benefits:Muscle growth, strength, recovery, and weight gain
Our verdict“Choose these chews for a chewable muscle-support approach, but skip them if you need a clearly quantified calorie dose.”
Dog Weight Gainer Liquid Food Topper with Salmon, MCT, Olive, and Flaxseed Oils, 16 fl oz
This topper is the clearest fit for owners who want to add an oil-based supplement directly to meals: it combines salmon, MCT, olive, and flaxseed oils and gives size-based spoon guidance. That makes it more straightforward to portion by dog size than YWUJID’s chews, whose supplied details omit a dose. The 16-fluid-ounce bottle is also less imposing than PetAg Dyne’s gallon, while its stated 96 servings point to a measured, meal-by-meal routine. The tradeoff is that this is an oil blend, not a complete food, and the product description provides no supporting evidence for its weight-gain or broader health claims. Salmon also rules it out for dogs with fish allergies or sensitivities. I’d pick it for an easy drizzle, not as a replacement for a calorie-appropriate diet.
Pros:- Combines MCT, salmon, olive, and flaxseed oils.
- Size-based suggested doses make portioning more straightforward than products with no dose listed.
- Drizzle-on format avoids needing to mix a powder.
- 16-fluid-ounce bottle is easier to store than PetAg Dyne’s gallon supply.
Cons:- Salmon may not suit dogs with fish allergies or sensitivities.
- No calorie amount is supplied, so its contribution to a weight-gain plan is difficult to quantify.
- Weight-gain and health claims are not supported by evidence in the supplied description.
Best for: Owners who want a measured, oil-based topper to drizzle over meals and prefer size-based serving guidance.
Not ideal for: Dogs with fish allergies, caregivers seeking a complete food, or buyers who want substantiated calorie information rather than broad weight-gain claims.
- Form:Liquid
- Flavor:Salmon
- Bottle size:16 fluid ounces
- Servings:96
- Active ingredients:MCT oil, salmon oil, olive oil, and flaxseed oil
- Suggested dose:1 spoon under 25 lb; 2 spoons at 26–50 lb; 3 spoons over 50 lb
- Made in:USA
Our verdict“Choose this topper for convenient, size-guided oil supplementation, but not if your dog cannot tolerate fish or needs a quantified calorie plan.”
Miracle Vet High-Calorie Weight Gainer Gel for Dogs and Cats
Miracle Vet is the most flexible pick here for a home with both dogs and cats: its beef-flavored gel is listed for both species and can be mixed with food or water. The label gives a calorie figure—2,400 calories per 16 ounces—which offers more planning context than the YWUJID chews or the oil-based topper, though it does not state a serving dose in the supplied information. Its 29 vitamins and minerals make it a broad nutritional supplement, but that count alone does not establish how much of each nutrient a pet receives. Compared with Ready Cal, Miracle Vet comes in a larger 16-ounce container and is not described with a dial-a-dose feature. I’d check the full feeding directions and confirm the calorie figure’s relevance to a serving before using it to plan weight gain.
Pros:- Listed for both dogs and cats, including different ages and sizes.
- Provides a stated calorie figure for a 16-ounce quantity.
- Contains 29 vitamins and minerals, plus omega fish oil and whey protein.
- Can be mixed with food or water.
Cons:- The stated 2,400 calories apply to 16 ounces, not a specified serving.
- No serving dose is included in the supplied details.
- Broader vitamin and mineral coverage does not make it a complete food.
Best for: Households seeking one beef-flavored gel supplement listed for both dogs and cats, with a stated total calorie figure for the container quantity.
Not ideal for: Owners who need precise per-serving calorie and dose information or prefer a dog-specific product with a portioning tube like Ready Cal.
- Form:Liquid gel
- Flavor:Beef
- Weight:16 ounces
- Volume:473 ml
- Calories:2,400 per 16 ounces
- Vitamins and minerals:29
- Target species:Dogs and cats
- Origin:Made in the USA
Our verdict“Pick Miracle Vet for a shared dog-and-cat gel supplement, but confirm serving directions before relying on its calorie figure for a weight plan.”
ZENO Weight Gain and Muscle Support Chews for Dogs, Chicken, 150 Count
ZENO stands out for pairing calorie-dense nutrition with several named amino acids, including leucine, isoleucine, and valine, aimed at supporting muscle growth alongside weight gain. That makes it a more muscle-focused chew than PetAg Dyne, which supplies concentrated calories in liquid form rather than highlighting an amino-acid blend. Chicken flavor and a chew format may suit dogs that resist powders or toppers, while salmon oil, glucosamine, and added botanicals broaden the formula beyond calories alone. The tradeoff is limited practical guidance: the supplied product information gives no feeding directions or dosage, so I would check the label and ask a veterinarian before adding it, especially for a puppy or a dog with a medical condition. It is a supplement, not a replacement for a complete diet.
Pros:- Includes multiple amino acids associated with muscle support.
- Calorie-dense formula is intended to help support healthy weight gain.
- Chew format and chicken flavor may be easier to offer than a powder.
- Listed as suitable for puppies and adult dogs of all breeds.
Cons:- No feeding directions or dosage details are provided in the supplied product information.
- The multi-ingredient supplement may not fit every dog’s dietary or health needs.
Best for: Owners of dogs that need weight support alongside muscle-focused nutrition and will readily take chicken-flavored chews.
Not ideal for: Owners who need clear dosing instructions or a straightforward calorie-only add-on; the supplied details do not state serving guidance, and the added ingredients may not suit every dog.
- Brand:ZENO
- Form:Chews
- Flavor:Chicken
- Count:150
- Item weight:0.37 kg
- Key amino acids:L-arginine, L-glutamine, L-leucine, L-isoleucine, L-valine
- Additional ingredients:Turmeric, ashwagandha, salmon oil, astaxanthin, vitamin C, glucosamine HCL
- Listed suitability:Puppies and adult dogs of all breeds
Our verdict“Choose ZENO if you want a chew combining calorie support with several muscle-focused amino acids and can confirm an appropriate serving with your veterinarian.”
All American Canine Dog Weight Gainer Powder, 60 Servings
All American Canine is the most ingredient-varied powder in this group, combining beef broth and whey proteins with beef liver, produce, vitamins, and probiotics. That broader blend sets it apart from PetAg Dyne, which takes a simpler liquid-calorie approach, and from the amino-acid-focused ZENO chews. For an owner looking to mix weight support into food while also adding protein and other nutrients, the powder format offers a flexible route. The listing describes it as palatable and free of artificial colors and trans fats, but does not provide serving directions or a serving-size measure in the supplied details. That gap makes it harder to plan calorie intake, particularly for small dogs or dogs already receiving a nutrient-dense diet. I would treat it as a targeted supplement, not an everyday addition for dogs that do not need extra weight.
Pros:- Combines beef broth protein and whey protein with additional food ingredients.
- Includes fruits, vegetables, vitamins, and probiotics.
- Powder form can be added to a dog’s food.
- Made without artificial colors or trans fats, according to the product description.
Cons:- No serving size or feeding directions are provided in the supplied information.
- The broad ingredient mix may be unsuitable for dogs with specific dietary sensitivities.
- Weight-gain supplementation is not appropriate for every dog.
Best for: Owners of underweight dogs who prefer mixing a protein- and produce-containing powder into meals and want more than a calorie-only supplement.
Not ideal for: Owners who need clear serving instructions or a low-complexity calorie boost; the supplied details omit serving size and the multi-ingredient blend may not suit every dog.
- Brand:All American Canine
- Form:Powder
- Servings:60
- Unit count:1.86 pounds
- Target species:Dog
- Key ingredients:Beef broth protein, whey protein, ground flaxseed, beef liver, sweet potato, pumpkin, blueberry, sunflower lecithin, organic kelp
- Model number:AAC-WG-60
- UPC:850055396012
Our verdict“Pick this powder if you want a broad protein-and-nutrient blend to add to meals and can get clear portion guidance before feeding.”
PetAg Dyne High-Calorie Liquid Nutritional Supplement for Dogs and Puppies, 16 oz
PetAg Dyne is the simplest fit here when the goal is adding concentrated calories without introducing a powder or chew routine. Its liquid can be fed directly or poured over food, making it more adaptable at mealtime than the ZENO and OKKÖBI chews. The listing includes dogs and puppies from 8 weeks old, as well as active, pregnant, lactating, underweight, and senior dogs, so it covers more stated use cases than the muscle-focused supplements. However, this is a calorie supplement, not a protein- and amino-acid-centered formula like All American Canine’s powder. Flavor information also conflicts: the specifications say unflavored, while the title and description identify sweet vanilla. I would verify the label and follow veterinary advice, especially for dogs whose calorie or fat intake needs close control.
Pros:- Concentrated calories come in a liquid format.
- Can be fed directly or poured over food.
- Listed for dogs and puppies 8 weeks and older.
- Description names active, pregnant, lactating, underweight, and senior dogs as intended users.
Cons:- Flavor is inconsistent across the listing: unflavored in specifications and sweet vanilla elsewhere.
- The supplied details do not provide a feeding amount.
- A calorie-focused supplement may not suit dogs that need calorie restriction or a different nutritional plan.
Best for: Caregivers of dogs that need a small-volume calorie addition and prefer a liquid they can offer directly or pour over food.
Not ideal for: Owners seeking a clearly specified flavor or a muscle-focused protein and amino-acid supplement; the listing has conflicting flavor details and emphasizes calories.
- Brand:PetAg
- Form:Liquid
- Volume:16 fluid ounces
- Weight:16 ounces
- Flavor:Conflicting listing details: unflavored in specifications; sweet vanilla in title and description
- Recommended age:8 weeks and older
- Active ingredients:Folic acid, vitamin C, vitamin E
- Model number:20510
- UPC:020279205104
Our verdict“Choose this Dyne listing for flexible, low-volume liquid calorie support, but confirm the flavor and serving directions before buying.”
Weight Gain Chews for Dogs, Muscle Builder, High Calorie, 150 ct, Chicken
These OKKÖBI chews target dogs that need added calories alongside muscle and recovery support, with amino acids, salmon oil, vitamins, and glucosamine named in the description. Compared with PetAg Dyne, they offer a chew rather than a liquid calorie boost; compared with ZENO, they occupy a similar muscle-support niche but the listing specifically describes them as vet-approved. That claim and all-breed, puppy-to-adult suitability may appeal to owners of active dogs, though the supplied details do not identify the approving veterinarian or give a dose. The key management issue is calorie intake: adding a high-calorie chew on top of regular meals without adjusting the feeding plan could overshoot a dog’s needs. I would choose these only when a veterinarian agrees that extra calories are appropriate and can guide the serving amount.
Pros:- Description names a full spectrum of amino acids for muscle support.
- Calorie-dense chew format may be convenient for dogs that resist powders.
- Includes salmon oil, vitamins, and glucosamine.
- Listed as suitable for all breeds and life stages.
Cons:- Excess calories are possible if the chews are added without adjusting the dog’s overall feeding plan.
- The supplied details do not include serving directions or dosage.
- The vet-approved claim is not accompanied by further information in the supplied text.
Best for: Owners of active or underweight dogs that accept chicken-flavored chews and need calorie support paired with muscle- and joint-oriented ingredients.
Not ideal for: Owners who need transparent dosing or a clearly documented approval basis, or whose dogs must keep calorie intake tightly controlled.
- Brand:OKKÖBI
- Form:Chews
- Flavor:Chicken
- Count:150
- Item weight:0.37 kg
- Model number:Pet Products
- Manufacturer part number:OKMUS2630
- Target users:All breeds; puppies to adults, per description
Our verdict“Consider these chews for an active dog needing calorie and muscle support, provided you can confirm a suitable dose and account for the added calories.”
PetAg Dyne High-Calorie Liquid Nutritional Supplement for Dogs and Puppies, 16 oz
This second PetAg Dyne listing describes the same practical approach as the other 16-ounce Dyne option: concentrated liquid calories that can be fed directly or poured over food. Its clearest distinction is that the description calls the flavor sweet vanilla, which may help owners looking for a flavored topper, although the specifications contradict that and say unflavored. Against All American Canine’s powder, Dyne is the more direct calorie-focused choice and avoids mixing a dry supplement; it does not offer the same listed blend of proteins, produce, and probiotics. The product is intended for dogs from 8 weeks old and a range of needs, but the supplied information gives no serving directions. It also flags a high-fat formula, so this is a poor fit for dogs whose diet requires fat or calorie limits without veterinary guidance.
Pros:- Concentrated liquid provides calories in a low-volume format.
- Can be fed directly or poured over food.
- Listed for dogs and puppies from 8 weeks old.
- Description identifies sweet vanilla flavor and use for performance and endurance support.
Cons:- Flavor information conflicts between the title and specifications.
- The listing describes a high-fat formula that may not suit every dog’s dietary needs.
- No serving directions are included in the supplied product information.
Best for: Owners seeking a ready-to-pour liquid calorie supplement for a dog that can use extra energy and whose feeding plan allows the added fat.
Not ideal for: Owners who need unambiguous flavor information, serving guidance, or a supplement suitable for dogs on fat-restricted diets.
- Brand:PetAg
- Form:Liquid
- Volume:16 fluid ounces
- Item weight:16 ounces
- Minimum age:8 weeks
- Flavor:Sweet vanilla in title; unflavored in specifications
- Listed benefits:Weight gain; performance and endurance support
- UPC:827165709292
- Number of items:1
Our verdict“Choose this Dyne listing if a pourable calorie supplement suits your dog’s diet, but confirm the flavor and feeding amount with the label or your veterinarian.”
Pet Care Sciences Dog Weight Gainer, Sweet Bacon, 90 Servings
For a buyer seeking a calorie-dense addition to a dog’s existing meals, this powder stands out for its listed 30% crude protein and 34% crude fat. It can be mixed into wet food or sprinkled on top, so it adds calories without requiring a full diet change. Compared with Under the Weather Ready Cal Powder, which specifies 40 calories per scoop and lists vitamins and minerals, Pet Care Sciences emphasizes higher protein and fat percentages but does not provide a calorie count in the supplied details. Its sweet bacon flavor may help with reluctant eaters, and the 90-serving package offers a defined serving count. The tradeoff is that its high fat content may not fit every dog’s diet, and the listed health-support claims are not backed by evidence in the product information. I’d use it as a targeted supplement, not a substitute for veterinary guidance about unexplained weight loss.
Pros:- Lists 30% crude protein and 34% crude fat for a concentrated nutritional addition.
- Powder can be mixed into wet food or used as a topper.
- Sweet bacon flavor may appeal to some picky dogs.
- 90 servings gives buyers a stated serving count.
Cons:- High fat content may not suit dogs with dietary restrictions.
- No calorie amount per scoop is provided in the supplied product details.
- The stated joint, digestion, skin, and coat support claims lack supporting evidence in the listing.
Best for: Owners whose veterinarian recommends adding a concentrated protein-and-fat powder to an adult dog’s current meals, especially when a bacon-flavored topper may help encourage eating.
Not ideal for: Dogs that need a carefully limited-fat diet, or owners who need a clearly stated calorie amount per serving to track intake.
- Form:Powder
- Flavor:Sweet bacon
- Servings:90
- Crude protein:30%
- Crude fat:34%
- Item weight:1.8 pounds
- Suggested serving:1 scoop daily for adult dogs; 1/2 scoop for puppies
- Made in:USA
Our verdict“Choose this powder when a veterinarian-approved, protein- and fat-forward topper suits your dog better than a supplement with a declared calorie count.”
Under the Weather Ready Cal Powder for Dogs, Chicken Flavor, 10.58 oz
Among these four options, Ready Cal is the clearest pick for owners who want a stated calorie contribution: 40 calories per scoop. That figure makes it easier to track what the topper adds than with Pet Care Sciences Dog Weight Gainer, whose supplied details list protein and fat percentages but no calories per serving. The powder can be sprinkled over food or mixed with warm water, giving it more serving flexibility than PetAg Dyne, which is described as a liquid fed directly or poured over a meal. Ready Cal also lists 9 vitamins and 6 minerals, alongside carbohydrates and omega fatty acids, and is described as free of artificial flavors and dyes. Its limits are clear: it is aimed at dogs needing weight or appetite support, and chicken flavor may not work for dogs with a chicken sensitivity or strong flavor aversion.
Pros:- Provides a listed 40 calories per scoop for easier intake tracking.
- Includes 9 vitamins and 6 minerals, plus carbohydrates and omega fatty acids.
- Can be sprinkled on food or mixed with warm water.
- Described as free of artificial flavors and dyes.
Cons:- Chicken flavor may not suit dogs with chicken sensitivities or flavor preferences.
- The product is intended for dogs needing weight or appetite support rather than as a general meal.
- The supplied details do not give the number of scoops or servings per package.
Best for: Owners who want a powder topper with a declared per-scoop calorie amount and flexible options for serving it with food or warm water.
Not ideal for: Dogs avoiding chicken ingredients or flavor, and households looking for a general-purpose food rather than a targeted weight- and appetite-support powder.
- Form:Powder
- Flavor:Chicken
- Net weight:10.58 oz
- Calories:40 per scoop
- Vitamins:9
- Minerals:6
- Target species:Dog
- Breed size:All
- Shelf life:24 months from manufacturing date
Our verdict“Pick Ready Cal when a stated 40-calorie scoop and powder serving options matter more than a high-fat profile or liquid format.”
PetAg Dyne High-Calorie Liquid Nutritional Supplement for Dogs and Puppies, 16 fl oz
PetAg Dyne makes the most sense when adding calories without taking up much room in a dog’s stomach is the priority. Its concentrated liquid can be fed directly or poured over food, unlike Pet Care Sciences Dog Weight Gainer, which needs to be mixed as a powder. The listing says it is suitable for dogs eight weeks and older, including active, pregnant, lactating, underweight, and senior dogs; that broad intended use gives it more life-stage reach than Under the Weather Ready Cal Powder’s weight- and appetite-support focus. Still, the supplied details do not state calories per serving, so it is harder to quantify its contribution than Ready Cal’s 40-calorie scoop. There is also a flavor inconsistency: the title says sweet vanilla while the specifications say flavorless. I’d check the product label and ask a veterinarian before using a high-fat supplement for a dog with dietary limits.
Pros:- Concentrated liquid is intended to add calories without taking up much stomach capacity.
- Can be fed directly or poured over food.
- Listed for dogs eight weeks and older, including several life stages and activity needs.
- Liquid format avoids mixing a powder into meals.
Cons:- No calorie amount per serving is included in the supplied details.
- High-fat content may not suit every dog’s dietary needs.
- Flavor information conflicts between the title and specifications.
Best for: Caregivers of dogs eight weeks and older who need a liquid calorie supplement that can be given directly or added to food, including dogs with limited meal capacity.
Not ideal for: Owners who need an exact calorie amount per serving, or dogs whose diet requires close control of fat or flavor ingredients.
- Brand:PetAg
- Form:Liquid
- Volume:16 fl oz
- Flavor:Sweet vanilla in title; flavorless in specifications
- Minimum age:8 weeks
- Target species:Dogs and cats
- Unit count:1
Our verdict“Choose Dyne when a concentrated liquid and low meal volume matter more than a clearly stated per-serving calorie count.”
Solid Gold Chicken & Liver Wet Dog Food, 6 Cans
Solid Gold Chicken & Liver is the only one of these four that is presented as a wet food for a complete meal or a topper, rather than a dedicated calorie supplement. That makes it a more natural fit for owners who want to increase food variety or mix wet food into an existing dry-food routine. Its chicken, brown rice, and pearled barley base differs from PetAg Dyne’s concentrated liquid approach and Pet Care Sciences Dog Weight Gainer’s protein- and fat-focused powder. The product is listed for all life stages and breed sizes, and the pate texture offers another way to serve it alongside dry food. But the supplied information gives neither can size nor feeding instructions, so it does not let buyers calculate how much to feed for weight gain. It also contains barley, which may be a poor fit for dogs whose diet excludes grains.
Pros:- Can be served as a meal or used as a topper with dry food.
- Pate format offers a different serving texture from the powders and liquid supplements.
- Listed for all life stages and breed sizes.
- Made with chicken, brown rice, and pearled barley; described as wheat-free.
Cons:- Contains grains, including barley.
- Can size and feeding instructions are not provided in the supplied details.
- No calorie or nutrient figures are supplied to guide weight-gain portions.
Best for: Owners who want a chicken-and-liver wet food to serve as a meal or mix with dry food, rather than adding a separate powder or liquid supplement.
Not ideal for: Buyers who need precise feeding guidance for weight gain, or dogs whose dietary plan avoids grains such as barley.
- Brand:Solid Gold
- Flavor:Chicken & liver
- Form:Pate
- Life stage:All life stages
- Main ingredients:Chicken, brown rice, pearled barley
- Special use:Digestive health
- Breed size:All breed sizes
- Allergen information:Wheat-free
- Package contents:6 cans
Our verdict“Choose this wet food when you want to add a meal or topper to the feeding routine, but not when precise calorie planning is the main need.”
How We Picked
I compared these 14 listings by how clearly they serve a weight-gain feeding plan: whether each is a food or supplement, its format, serving flexibility, and the practical fit for dogs with different appetites and owner routines. I also considered how easy it is to distinguish the listed products, since several PetAg Dyne entries share a name but differ by package size, and whether a listing provides enough information for a buyer to check calories and feeding directions.
The ranking favors options with a clear role and a format that can be matched to a dog’s eating habits, while recognizing that supplements cannot diagnose or treat the cause of weight loss. Liquid Dyne leads as the most versatile supplement family in this lineup; Ready Cal Gel earns a place for concentrated, portionable use, and Solid Gold wet food is ranked for buyers seeking a food-based alternative. Powders, chews, and other gels remain useful for specific preferences, but their suitability depends on label details, the dog’s tolerance, and veterinary guidance. Repeated Dyne listings are treated as size or listing variations, not as separate nutritional breakthroughs.
Factors to Consider When Choosing Dog Food To Gain Weight
Choosing a weight-gain product is less about finding the most concentrated option and more about fitting it safely into the reason your dog is underweight. I’d use these broader checks to narrow the field before ordering.
Find the reason for low weight before adding calories
Unplanned weight loss can be linked to illness, parasites, dental pain, stress, or trouble absorbing food, so a supplement may mask a problem without addressing it. I’d arrange a veterinary check if your dog is losing weight, has a reduced appetite, or shows changes in thirst, stool, energy, or behavior. Ask what target weight and rate of gain make sense for your dog’s age, activity, and health. A gradual plan can make it easier to spot digestive intolerance and adjust portions. Avoid using a weight-gain product as a substitute for diagnosis, especially when the weight change is sudden or unexplained.
Compare calories per serving, not just package size
A large tub or bottle does not tell you how much energy each daily portion adds. Check calories per serving, the recommended amount for your dog’s weight, and how many servings the package provides. Then compare that addition with your dog’s existing meals so you can avoid increasing intake more than intended. Product labels may use different serving sizes, which makes a direct comparison difficult unless you convert them to the same daily amount. If calorie information is missing or unclear, ask the manufacturer or your veterinarian rather than guessing from the product name.
Choose a format your dog will actually eat
Liquids can be poured over food or portioned separately, gels offer a concentrated format, powders can be mixed into a meal, and chews may suit dogs that accept treats more readily than toppers. Each format has a practical downside: liquids can be messy, gels may be unfamiliar, powders can change food texture, and chews may not work for dogs with chewing or ingredient sensitivities. Start by matching the delivery method to your dog’s habits instead of assuming a particular format is more effective. Introduce any new product gradually and watch for digestive changes. If your dog refuses the supplement, a calorie plan built around a suitable complete food may be more useful.
Keep a complete diet at the center of the plan
Many weight-gain products in this roundup are supplements or toppers, not complete-and-balanced meals. That distinction matters because adding calories through a supplement does not automatically provide the nutrient balance of a full diet. Check the label for whether the product is intended for supplemental feeding and follow its directions. Wet food such as Solid Gold Chicken & Liver offers a meal-style option, but buyers should still confirm the food’s life-stage suitability and feeding guidance. I’d avoid replacing a substantial share of a dog’s regular diet with a supplement unless a veterinarian has recommended that approach.
Check ingredients and health restrictions before choosing
Flavors and added oils can make a product appealing, but they also matter for dogs with food sensitivities or a history of digestive trouble. Review the full ingredient list, not only the flavor on the front of the package, and check with your veterinarian if your dog has pancreatitis, allergies, or another condition that affects diet. Products with muscle-support language may have a different intended use from a calorie supplement, so read the feeding directions and claims carefully. More ingredients or a broader claim does not automatically make a product a better fit. When in doubt, bring the label to your veterinary appointment.
Choose package size around the trial period and routine
The Dyne listings include both smaller containers and a gallon size, so package scale is a real buying decision in this roundup. A large container may be convenient for a multi-dog household or an established plan, but it is a poor first choice if you do not know whether your dog will accept the flavor or tolerate the formula. Smaller packages can limit waste while you evaluate fit, even if they need replacing sooner. Check storage directions and use-by guidance after opening, especially for liquids and wet food. I’d confirm the exact size and product details at checkout because several listings have similar names.
Frequently Asked Questions
Should I choose a calorie supplement or switch to a higher-calorie food?
That depends on why your dog is underweight, what they currently eat, and whether they will reliably accept a topper. A supplement can add calories without changing the main food, while a complete food may better suit a dog that rejects add-ons or needs a broader meal change. Check that any food is appropriate for your dog’s life stage and health needs. Ask your veterinarian whether to increase the current diet, change foods, or add a supplement before making a major change. Track weight and appetite so the plan can be adjusted rather than continued automatically.
Can I use more than one weight-gain product at the same time?
I would not combine products by default, since their calories and ingredients can add up quickly and may upset digestion. First find out the total daily calorie target recommended for your dog, then account for meals, treats, and every supplement. Some products may overlap in purpose or contain ingredients that are unsuitable for a particular dog. A veterinarian can help decide whether one product is enough and how to introduce it. If you are already using a supplement, get advice before adding another.
How do I compare the several PetAg Dyne listings?
The lineup includes a gallon listing and multiple 16-ounce or 16-fluid-ounce listings with very similar names. Treat these as package or listing variations unless the label shows a formula difference; do not assume each entry has a distinct nutritional profile. Verify the exact size, ingredient panel, feeding directions, and intended age range on the listing you plan to buy. A smaller bottle may make more sense for a first trial, while a larger container may suit an established routine. Compare cost only after confirming you are looking at the same formula and serving guidance.
Are weight-gain chews a good choice for a dog that refuses liquid supplements?
Chews may be easier to offer to a dog that accepts treats, but acceptance does not tell you whether they provide an appropriate calorie contribution. Check the calories per chew, recommended daily amount, and whether the product is intended as a supplement rather than a complete food. Read the ingredients closely if your dog has sensitivities, and confirm that the chew’s size and texture suit your dog. A dog that refuses liquids may also dislike a chew, so avoid buying a large supply before confirming acceptance. Discuss the product with your veterinarian if your dog has a medical condition or is losing weight unexpectedly.
When should I stop a weight-gain supplement and call the veterinarian?
Contact your veterinarian if weight loss is unexplained, continues despite a feeding plan, or appears alongside vomiting, diarrhea, low energy, increased thirst, or appetite changes. Stop a new product and seek advice if your dog develops a reaction or persistent digestive upset after starting it. Even without obvious symptoms, check in if your dog gains weight too quickly or does not respond as expected. Bring the product label and a record of meals, treats, and weight changes to the appointment. A supplement should support a monitored plan, not delay care.
Conclusion
For most buyers seeking a flexible supplement format, PetAg Dyne High-Calorie Liquid Nutritional Supplement is my best overall choice in this lineup, with the right package size depending on whether you are trialing it or already following a plan. Best value is a practical role for the smaller Dyne listing when you want to test acceptance before committing to a gallon; best premium is the larger Dyne format for households with an established routine and a veterinarian-approved need. Best for beginners is Under the Weather Ready Cal Gel, since its concentrated format can be easier to portion while you learn how your dog responds. For dogs that prefer meals to add-ons, choose Solid Gold Chicken & Liver Wet Dog Food as the food-based option, after checking suitability and feeding directions. If your dog is losing weight without a clear reason, make the veterinary appointment the first step and choose a product only as part of that plan.
