The easiest way to define a puppy mill is a dog breeding facility that places the utmost importance on profits, and little to no importance on the health and safety of its dogs. Unfortunately, there are an estimated 10,000 of these facilities in the United States.
Many times people inadvertently buy puppies from puppy mills. Often times puppies from puppy mills aren't in good health, and they may be poorly socialized. There are several signs that a puppy may be from a puppy mill.