Get 10% off your purchase at PetCareRx.com via code IMBACK. Plus, shipping is free with all orders of $49 or more. This matches the best percent-off coupon we've seen from them, and it ends 9/1. If you're making a smaller purchase, you can use code GC7A5C9F to take $5 off $49 or more. Spend less than $35 and shipping starts at $5.99. Note that "internet only" pricing will be adjusted back to regular pricing when you use the codes on prescriptions, but it will get you a better discount in most cases. The coupons will not work on food. There is no sales tax (except NY).