Puppy Mill

A puppy mill, sometimes known as a puppy farm, is a commercial dog breeding facility that is operated with an emphasis upon profits above animal welfare and is often in substandard conditions regarding the well-being of dogs in their care. Similar types of operations exist for other animals most commonly kept as pets or used as feed for other animals. The term can be applied to operations involving other animals commercially bred for profit, e.g. "kitty mills." There are an estimated 4,000 puppy mills in the U.S. that produce more than half a million puppies a year. Commercial kennels may be licensed by the United States Department of Agriculture which may inspect the kennels routinely.

For-profit breeding on a smaller scale may be referred to as backyard breeding, although this term has negative connotations and may also refer to unplanned or non-commercial breeding.

Although no standardized legal definition for "puppy mill" exists, a definition was established in Avenson v. Zegart in 1984 as "a dog breeding operation in which the health of the dogs is disregarded in order to maintain a low overhead and maximize profits." The ASPCA uses a similar definition: "a large-scale commercial dog breeding operation where profit is given priority over the well-being of the dogs."