Hi there. I’m sorry it took us a while to respond…I’ve been pondering over this since you initially posted. I think you may have to consider permanent separation. This is doable in a cat household, as you’ve seen, though it can be annoying, but it might be safest for the clowder.
I assume you’ve tried Feliway?
Hi there.
It’s very possible, even likely, that this brand makes him ill – my senior cat couldn’t have Hill’s Science Diet when he was younger, as it gave him diarrhea and projectile vomiting. I had to change the brand to something higher quality for the majority of his life. Have you tried any other brands of food for him?
Not sure what else to try. He also does this occasionally after just eating treats, no matter what brand.
I don’t know where you’re located to give food suggestions but I would absolutely ask your regular vet this question.