My 8 year old cat had bladder stones a year ago. The vet put him in the Urinary SO food. It worked and the stones broke apart. At his 1 year check up they are telling me that he is now a diabetic. Can the food they said he needed to eat have given him diabetes? He has been on both dry and wet. I have 2 other cats also that I am now worried about. Anyone know of any food I can give him to try and correct the diabetes?