Coupon code: WEBC5 ($5 off any purchase) Coupon code: TENOFF (10% off any purchase)
These are two nice codes from 1-800-PetMeds. You can get $5 off any purchase with the code, "WEBC5". Or, if you're going to spend more than $50, then just use the code, "TENOFF", to get 10% off your order.
Oh...and standard shipping is $4.99, so it's basically like getting free shipping on your order without having to meet the $39 minimum.