I admire you for facing up to this dilema and being prepared to make tough decisions. My Artful Dodger was a constant stalker and pouncer, he even jumped on my elderly Ginger the day before he died of multiple disorders, he just couldn't stop the behavior. I tried medication, isolation, temporary rejection for bad behavior, lots of things. The problem for me was that the cats he picked on were all "very difficult to place" kind of cats, so finding homes any one of them would have been miraculous. And I had a very close bond with Dodger as he did with me. Also, I'd seen far too many bad and indifferent homes for cats to consider trying to re-home him. So, we all lived with it and it was often miserable.

Now I have another one, but she's a perpetual motion kind of cat that pounces because she wants to rough-house with any cat she sees. She needs to be with other cats and the two males she lives with have learned to deal with her. Taranis, on the other hand, hates her and I do have peeing in wrong places problems with her.

I look at carers of many cats such as Gina and Gary and shake my head in wonder. How do they manage to have such relatively calm households?

Good luck with your search for a new and good home for Monte and Gus.