Puppy mills are a large breeding ground for dogs. There are inspections that approve puppy mills- but far too often the bar is set to low, and an approved puppy mill is a horrible sight to see. Many dogs are shoved into small cages stacked on top of each other with little food, water, or cleanness. Many puppies die while in the puppy mill. Before they are sold to pet stores they may be cleaned and auctioned, giving a deceptive impression that the puppy has been well taken care of. The puppies may be under-socialized, underweight, have vitamin deficiencies, food intolerances, and more. Stop the abuse. Make puppy mills illegal in the USA.