We have a complete list of PETCO discount codes and PETCO.com coupons that you can use to help save money on your order. PETCO coupons can expire at any time without any notice, so when you redeem your PETCO.com discount, please make sure that it was applied properly to your order before completing the checkout process. PETCO Animal Supplies, founded in 1965, is the leading specialty retailer of premium pet food and supplies through a national chain of superstores. With 40 years of success, PETCO continues to solidify its position as the leader in the pet food and supply industry. Shop for all your pet's needs including food, toys, and grooming products for dogs, cats, fish, and other pets.