I have 17+ year old cat. Physically is decent health I guess. He has diabetes and gets 2 shots a day, and also had an accident this summer and now has a limp and can't jump. Lately though (past 2 months) he has really been acting senile. Cries constantly (never did before), will eat 3-4 cans of food a day if we let him, then not even an hour after eating cries for more food, like he hasn't eaten in days. He has started to pee, well, where ever. He will be walking, stop, squat, and pee.
If he is near the litter box he will use it. I have spent hundreds on vet fees and meds since March when he was diagnosed.
Anyway I have been thinking that its time to put him down, but I am struggling with the fact that physically he is not that bad, just mentally losing it. I have not done it yet because I know I will have to live with this guilt unless I am 100% sure it was the right thing to do. If he were noticably in pain it would be so much easier.
Anyone dealt with this before, or have advice to offer?
If he is near the litter box he will use it. I have spent hundreds on vet fees and meds since March when he was diagnosed.Anyway I have been thinking that its time to put him down, but I am struggling with the fact that physically he is not that bad, just mentally losing it. I have not done it yet because I know I will have to live with this guilt unless I am 100% sure it was the right thing to do. If he were noticably in pain it would be so much easier.
Anyone dealt with this before, or have advice to offer?

I cleared that up real quick with her.