A pet shop is a place where dogs, cats, birds, rabbits, reptiles, rodents, fish, and other animals not born and raised on those premises are kept for the purpose of sale to the public. While many people are very satisfied with the pets they acquire from pet stores, critics of pet stores argue that there are numerous problems with the way most stores acquire, care for, and sell animals.
Many stores acquire most or all of their stock from large-scale commercial breeding operations that may also supply animals to industries that pet store patrons could find morally objectionable (such as cosmetics testing). Though not all of these facilities breed dogs, most are essentially the equivalent of puppy mills for other species. Overcrowded cages and long, stressful journeys via air or truck can cause the spread of disease, resulting in sick animals arriving in the store.