The sale of puppies in pet stores drives demand for puppy mills where breeding dogs spend their lives in barren cages with minimal veterinary care, socialization, or opportunities for natural behavior.
Puppy mills represent a concentrated welfare failure affecting millions of animals. Breeding dogs in these facilities experience chronic deprivation: restricted movement, minimal social interaction, repeated pregnancies without recovery, and eventual disposal when reproductive capacity declines. The pet store pipeline obscures these conditions from buyers who would likely reject them if directly visible. Legislative bans on pet store sales of commercially-bred puppies have proven effective at reducing mill operations in jurisdictions where enacted.