"Puppy mills are mass dog-breeding operations. These canine breeding facilities house dogs in shockingly poor conditions.
Life is particularly bad for "breeding stock," dogs who live their entire lives in crammed cages and are continually bred for years, without human companionship and with little hope of ever becoming part of a family. These dogs receive little or no veterinary care and never see a bed, a treat or a toy. After their fertility wanes, breeding animals are commonly killed, abandoned or sold to another mill. The annual result of all this breeding is hundreds of thousands of puppies, many with behavior and/or health problems."