Puppy mills — intensive commercial dog breeding facilities — cause widespread welfare harm to breeding dogs and their offspring. Understanding the problem drives better consumer and policy decisions.
Puppy mills cause suffering at two levels: the breeding adults, who spend their entire lives in small cages with repeated pregnancies and minimal social contact, and the puppies, who miss critical early socialisation windows and often carry heritable health problems from poor genetic management. The welfare harm to breeding dogs is particularly severe — these animals never experience normal dog life, are isolated from human companionship, and are treated purely as production units. Consumer demand for convenient puppy purchase through pet shops and online platforms drives this system. Purchasing from a responsible breeder who allows parental inspection, or adopting from a rescue organisation, removes demand from this welfare-harmful system.