Upon finding the product I needed, I went to check cart and added the 15% off coupon code listed on their homepage. It lowered the price and added the shipping cost, which was about equal to the 15% off code it showed for the total. Went I entered my card info the total removed the coupon code and added back the discount. I emailed the company and told them right away but never received a response from them. I sent another email explaining what happened and still no response from them. I would have continued to use this site if they responded but now I will buy from chewy.com instead.