My Missy Fluffs has come to have diabetes. She was a bit on the pudgy side when I rescued her, having lived in a cage for the first 2 years of her life. I've slimmed her down with exercise, but she's always had a very healthy appetite.
Recently, she began drinking a lot of water. I knew something was up, and then she vomited all over my house - got several rooms, and there were no hairballs in it. So, time to change the food and start monitoring her.
The monitoring isn't so bad, really, just a prick in her ear and take a drop of blood on my glucose meter. The same ones used for people can be used on cats. Just be sure you are looking at the correct range of blood values.
For food, the crunchies are hard to eliminate. Bugsy still eats nothing but crunchies, and the others supplement caloric intake with free-feeding all day. I'm getting some special food, Young Again Pet Food, Cat, Diabetic formula...
I'm also using some Instinct dehydrated raw food and adding some vitamins. That makes up a kind of gruel when mixed with hot water (thereby cooking the meat). They look at me like "what is this?" instead of eating it.
Princess seems to love it. Beasley will eventually put his nose to the bowl, Fluffy and Queenie just go hungry, and poor little Bugsie doesn't know what to do with it.
I'm currently feeding the Lamb formula, and will switch to the Venison later this week. I find it takes 3 mini-patties per feeding for 5 cats. I could probably do 5 of the patties, but right now this is working. Once they are all eating it, I will increase.
I'm adding a taurine supplement, since there is no taurine listed in the ingredients on the label. Cats must have that added to their food. Since the food is used for both cats and dogs, there are no additives of any kind. Pretty good stuff, actually!