PetFoodDirect.com takes 18% off sitewide with no minimum required, even on sale items, via coupon code PET4089. That's the best discount we've seen from them since February. Unlike most pet store coupons, this coupon can be used on pet food and non-food items alike. Shipping starts at around $6. This code works sitewide with no minimum on most items, even typically excluded Royal Canin Dog Food. Sales tax is not charged in most states. Note that prescriptions are excluded.