I am sorry for your troubles. I did everything wrong with my first cat due to lack of knowledge & it is good to have the support of people on this site. By the time I figured out that my cat had IBD it was too late. I was feeding him fish for years because he liked it. Very high quality but he was hocked on it. Could not get him to eat any of the foods good for IBD & force feeding was out of the question. With my new cat I am feeding Instinct cans only. Polling the people here & Chewys this seems like the best choice. She is constantly begging for food. I wish Instinct made more flavors of limited ingredient & low cal wet food. I think the limited ingredient foods would keep cats healthy for a life time as so many are developing IBD. I hope your cat will adjust to the new foods & do well. I have heard that many cats with IBD live long lives with proper food management.