Tracked by Evreward since 2005, Entirely Pets offers coupons, cash back rebates and rewards, with savings as high as $50 off. Entirely Pets discount coupons are somehwat rare, available a few times each year, but are often more valuable than similar merchants. Even when Entirely Pets doesn't have a coupon, you can always get up to 10% cash back, and other great rewards, with every purchase.