Bests & Worsts Reviews from Amazon

I used this with some success for years. Suddenly my dog started vomiting more and more frequently. He had frequent bouts of diarrhea, which is very unusual for him. I spent quite a bit of money at the vet with little success. When I eliminated things on his diet, this was the culprit. Either they changed the ingredients recently or he developed a sensitivity to the ingredients. I found a different glucosamine with a single ingredient which he tolerates well