Backyard breeding and puppy mills are motivated by profit and the perceived high demand for a particular breed, often without concern for the health or welfare of the animals involved. These animals may be sold through pet stores or directly from the breeders themselves. The AKC says that negligence and cruelty to animals is illegal throughout the US, and that the solution to irresponsible breeding is more effective enforcement of the law, rather than blaming responsible breeders or the demand for purebred animals. The CFA's legislative stance is similar to the AKC. The CFA also says that cat overpopulation is due to free roaming, unaltered pet cats, and feral cats, not purebreds. The CFA says that animal control agencies have failed to publicize complete statistics on the killing of dogs and cats that are dangerously aggressive, concealing the degree to which pet animal euthanasia will always be unavoidable.