Feathered and furry friends can really run up a bill, but stores like Petco and Petsmart make saving easier. Both Petco and Petsmart accept store, manufacturer and competitor coupons. At Petco’s Pals Rewards and Petsmart’s PetPerks will get you discounted prices throughout the store and members-only coupons, plus Petco Pals gives you $5 in-store credit for every $100 spent online or in store.