A few days back there was the sad post from Krazyaboutkats who had to rehome Cirrus.

My situation with my kitties was far less severe, but was starting to get annoying none the less. So I started using the "timeout" suggestion to calm the tensions between Sidney and Strauss.

Its really quite fun. I can see when one the little stinkers are about to cross the line with one or the other and I just scoop up the offender and lock him in a back bedroom for a few minutes. They really hate it and it does seem to difuse the situation. So far the score is Strauss- 2 lockups, Sidney - 1 lockup.