PetEdge
Details: Get Free Pet Shampoo Samples When You Spend $60+
Pet Meds
Details: they already have great prices and 5% on top of that was really cool.
Botanical Dog
Details: 15% off purchase. Store also offers free shipping w/purchases over $30. If coupon doesnt work at checkout, call and they will help you. They even gave me the current code when I was trying to use an expired one.