I'm trying to advise an elderly owner whose cat has just been diagnosed with diabetes. It is physically impossible for this person to give injections.
Hi, I agree with Kris that transitioning to a low carb wet diet is a good start. And in fact, if the cat is currently on a high carb diet this may make quite a difference. It may be that lowering the carb content of the diet will reduce the blood glucose to a
reasonable level, even if it is still above the normal range.
If the kitty has an infection or needs dental work, this can also raise the blood glucose levels until those things are resolved. (Although dentals don't seem to reduce blood glucose in all cats; it's not a miracle cure. But the cat will of course feel better.)
Regarding the oral meds, my understanding of Glipizide is that it makes the pancreas work harder, which can stress an already challenged pancreas.
Although the owner wouldn't be able to give injections, might she be able to use a Vetpen or some such thing..? Maybe a low carb wet diet with a nominal dose of insulin via Vetpen could be a course of action to consider...?
There was a situation, a few years back now, where as I recall, a member from Switzerland was helping an elderly lady in a neighboring village. Only occasional practical help could be given; but against all the odds that cat went into remission soon afterwards...