A puppy mill is a commercial dog breeding facility that prioritizes profit over the well-being of the animals. In these operations, dogs are often kept in overcrowded and unsanitary conditions, leading to health issues and poor living environments. Breeding dogs may be forced to produce multiple litters each year without proper care or socialization. Many puppies from puppy mills are sold through pet stores or online, often without proper health screenings. This practice contributes to the overpopulation of dogs and can result in behavioral and medical problems for the animals. Advocates encourage adopting from shelters or reputable breeders to combat the puppy mill industry.