I have two large sized cats. The smaller of the two is diabetic. For years I fed her high fiber, science diet cat food at the insistance of my last vet. She never slimmed down. I left food out all the time for them because cats were supposed to be able to self-regulate how much they ate or something. Well, now "Lily" is diabetic. When I found out, I really blamed it on the food. Now I feed her canned food twice a day and she gets about 3-4 crunchy treats at night. I don't feed any dry food any more, but I still have to give her insulin shots twice a day. (She is very good about this!) I thought that getting her on a low carb diet would reverse her dependance on insulin, but it hasn't. I think she has better control though. The other cat has slimmed down quite a bit eating low carb.

Missy