Popular on Evreward since 2005, PetSmart offers coupons, cash back rebates and rewards, with savings as high as $50 off. PetSmart discount coupons are somehwat rare, available a few times each year, and can be less valuable than similar merchants. Even when PetSmart doesn't have a coupon, you can always get up to 20% cash back, and other great rewards, with every purchase.