My vet told me a trick that works to keep a cat from eating too fast and thus overeating. Put a good sized rock in the center of the feeding dish. This forces the cat to eat around it, causing it to slow down. One of my cats eats too fast and therefore way more than she should and she also upchucks it right afterwards. This little trick prevents overeating and vomiting. I know you asked about Cosequin, sorry, no, I've not had to give it to any of my fur posse yet.