Puppymills are dirty, smelly, and house dogs in cramped quarters. Because of the conditions, the dogs may fight each other, develop neurotic behavior (such as obsessive licking, jumping, spinning, cage pacing, etc), and become susceptible to illness and injury. Oftentimes, dogs with wounds aquired during kennel fights or under other circumstances, will be left untreated. The cages
in which the dogs are kept have wire bottoms. The dogs are forced to spend their entire lives in these cages, with little or no human contact, exercise,health care, and training.
Mills
house a large number of breeding dogs, sometimes numbering well into
the hundreds. The only job of these animals is to produce puppies. The
puppies are in turn sold directly to pet shops or to middlemen--called
brokers--across the country. The puppies are shipped in cramped, crowded
trucks, at a very young age. Many times puppies become sick or injured
during the trek to their destination or even die. Damaged/ill puppies
are disposed of. The ones who are lucky enough to survive the ordeal end
up at the pet shops, or in the hands of brokers who then sell the
animals to pet shops.Puppymilling is big business in the United States, with annual grosses amounting to millions. The United States Department of Agriculture (USDA) inspects and licenses mills, but their standards for licensing are too low for the tastes of many knowledgeable dog people, including veterinarians, behaviorists, and trainers. In addition, many times violations of code are ignored, and disciplinary action is rarely taken against those mill operators who are deemed to be in violation of code. Dead, dying, and sick dogs, filthy grounds, and cramped cages may be found even at those mills that are USDA licensed. The mills do not get inspected enough, nor are millers given incentive to clean up their act. The mills that are not licensed by the USDA are even worse, as hard to imagine as that may be.
Where do the puppymill pups 
end up ?
Puppymill pups ultimately end up in pet shops. Those cute, sweet, innocent puppies you see in the window had their beginnings in a mill, probably in a situation much like what is described above. Most likely, their parents are still locked in cramped, dirty crates, forced to produce still more dogs for the industry.
Pet shops claim that their dogs come from breeders, that their animals are purchased from USDA licensed producers, and that the dogs are AKC registered (or other dog registries, some not reputable). The effectiveness of these claims depends largely upon the naivete' of the general public. Ask if the animals come from mills, and you will get an emphatic, "No!". But this of course is not true. The employees of these stores are coached on what to say to customers, and many times are not even aware of the truth behind the puppies they sell.
