Bests & Worsts Reviews from Amazon

I bought the first container directly thru Ultimate Pet Nutrition. It worked great for my dog. He quit chewing his paws. I got 2nd container from Amazon. My dog started chewing his paws again. I contacted the company directly where I got the first container. They informed me they DO NOT SELL THEIR PRODUCT thru ANY 3RD PARTY INCLUDING AMAZON. THEY also told me if Amazon is selling they are doing so illegally. This is not the product it claims to be. Do not buy.