I've been in your shoes. I had a cat, Tucker who kept sabbotaging RB Casey in the litterbox. After MUCH contemplating, it was the best solution to rehome Tucker. Casey had been there LOOOONG before Tucker. He's now living the life with my friends in Colorado. Couldn't ask for a better home.

I know how difficult it is for you. It's a difficult decision, but if it keeps peace and lets both cats live a stress free existence, they good for you!!!

You're in my thoughts and prayers. I hope you'll have visitation rights!