This is a very hard thread to read but necessary. How you took immediate action is excellent especially considering being manic. At some point, I will have to put my kitty cat down as well and have my carrier and choice of hospital ready. I'm relieved that there is at least a humane option for animals.

Dying at home does not equal dying pain free. Yes the trip to the hospital is stressful and I understand that guilt. But what were you suppose to do? You made the best and responsible decision.

I've seen the procedure done now three times in person. There is no suffering once the injection begins and the needle itself is small so they would only feel a prick if anything. Literally you cat falls asleep with 5 or 10 seconds and does not feel a thing at all. It's also important that you accompanied your cat to the hospital as he would have sensed your presence and scent, even in a semi-conscious state.