Companion animal breeding practices vary enormously in welfare quality, from careful hobby breeders to large-scale commercial operations with severe welfare failures.
The welfare gap between responsible breeders and commercial mills is enormous. Responsible breeders invest in genetic health testing, provide socialization, limit breeding frequency, and screen buyers. Mills confine breeding animals in cages for years, breed every heat cycle, and prioritize throughput. The same puppy sold by either source looks identical at purchase — distinguishing them requires knowing the breeder, visiting their facility, and asking the right questions.