PETCO Animal Supplies is a holding company for PETCO Animal Supplies Stores, the second-largest US retailer of specialty pet supplies (behind PetSmart). The company boasts about 1,250 stores in all 50 states and the District of Columbia, making it the only pet store to cover the entire US market. The chain sells more than 10,000 pet-related products for dogs, cats, fish, reptiles, birds, and other small animals. PETCO Animal Supplies holding company was formed to create a foundation for the firm's upcoming growth strategies. Founded in 1965, PETCO Animal Supplies is owned by TPG Capital and Leonard Green & Partners.