We have two seven year old cats. Ali (16 lbs) was diagnosed with diabetes two weeks ago. We have had his first glucose curve and it was still reading in the 400's so our vet changed his ProZinc to 3 units twice per day. Our other cat, Tyson weighs 22 lbs and has showed no signs of diabetes. We are feeding them one can each of wet food in the morning and one can each in the evening, at shot times. Our vet did tell us that we could leave dry food out for them to nibble on during the day. I've been reading labels and finding the low carb varieties but I also noticed that the recommended amounts to feed adult cats are 1 ounce per pound. That means that my cats should be eating about 4 cans each per day!!! We have also been cautioned on calorie counts and at four cans per day they are at about 600 calories with NO dry food. Is the two cans per day per cat a good place to be given their weight????