TL;DR
Colorado has signed into law a bill ending the sale of dogs and cats in pet stores sourced from puppy mills. The law aims to stop inhumane breeding practices and takes effect in January 2028. It reflects a broader national movement against puppy mill cruelty.
Colorado Governor Jared Polis has signed the Pistol the Pomeranian Protection Act into law, banning pet stores from selling dogs and cats sourced from puppy mills starting January 2028. This legislation marks a significant step in the state’s effort to combat inhumane breeding practices and protect animals from exploitation.
The new law prohibits pet stores statewide from selling dogs and cats that are bred in commercial breeding facilities known as puppy mills. It also prevents third-party brokers from moving animals through resale pipelines, effectively shutting down Colorado’s participation in the puppy mill supply chain.
According to the ASPCA, puppy mills are operations where dogs are kept in overcrowded, unsanitary conditions, often bred repeatedly without proper care, leading to health and behavioral issues. Puppies sold through pet stores and online retailers are frequently shipped into Colorado from these facilities, which prioritize profit over animal welfare.
Colorado joins other states like California and New York in passing similar legislation aimed at ending the retail sale of animals bred in inhumane conditions. The law was supported by key legislators, including House Majority Leader Monica Duran and Senate Majority Leader Robert Rodriguez, and reflects a growing national movement to eliminate puppy mill cruelty.
Why It Matters
This legislation represents a major victory in the fight against puppy mill cruelty, as it effectively cuts off the supply of inhumane-bred animals to Colorado’s pet market. By doing so, it reduces the demand for puppy mill puppies, encourages adoption from shelters and responsible breeders, and promotes more humane pet sourcing practices. The law also aligns Colorado with a broader societal shift toward animal welfare and responsible pet ownership.

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Background
Puppy mills have long been a contentious issue in the U.S., with many states enacting laws to curb inhumane breeding practices. Colorado’s legislation builds on this momentum, following similar laws in California, New York, and other states. The law’s passage comes after increased public awareness and advocacy by groups like the ASPCA, which have highlighted the cruelty inherent in puppy mills and the importance of responsible pet ownership.
Previously, Colorado pet stores sourced many of their puppies from out-of-state breeders, often in facilities with poor conditions. The new law aims to eliminate this pipeline, encouraging consumers to adopt from shelters or work directly with responsible breeders.
“”Colorado has a reputation for being one of the most dog-friendly states, and with the passage of this bill, we have joined the growing number of states that are rejecting inhumane pet sales practices.””
— Sabrina Pacha, ASPCA director of state legislation for the Mountain West region
“”This law will protect countless animals from inhumane treatment and ensure that Coloradans can adopt pets from responsible sources.””
— Governor Jared Polis

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What Remains Unclear
It is not yet clear how pet stores and breeders will adapt to the new law or how enforcement will be managed once it takes effect in January 2028. Additionally, the impact on existing puppy mill operations and out-of-state breeders remains to be seen.

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What’s Next
Next steps include the implementation of enforcement measures, public awareness campaigns, and monitoring the law’s impact on pet sales and animal welfare. Advocacy groups will likely continue to push for further legislation, including federal protections. Pet stores and breeders will need to adjust their sourcing practices accordingly.

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Key Questions
When does the Colorado law banning puppy mill pet sales take effect?
The law will go into effect in January 2028.
Does this law affect all pet stores in Colorado?
Yes, it bans all pet stores in the state from selling dogs and cats sourced from puppy mills.
Can Colorado residents still buy pets from breeders or shelters?
Yes, residents can still work directly with responsible breeders or adopt from shelters and rescues.
What is a puppy mill?
Puppy mills are commercial breeding facilities that house dogs in overcrowded, unsanitary conditions, often prioritizing profit over animal welfare, leading to health and behavioral issues in the animals.