Very stressful when our pets have problems... years ago one of our cats developed diabetes, but she was already quite old and we opted to just support her and love her for whatever time she had left, rather than stressing her with the shots and so on. She did still live for quite some time after being diagnosed, and then suddenly went downhill -- but at the time she was diagnosed my vet said that changing her diet wouldn't be of any help and I believe that was an error; in retrospect I think that if I had taken her totally off dry food and just gone with a high protein canned cat food she would have done even better. At any rate, I think I have a pretty good idea of what you're going through...
