I may just give this a try
I am still struggling with my two Aby cats. The breeder said they sometimes get goofy as they get older and she too has had problems with one old cat and has to keep it away from younger ones.
I just reinstalled their darn door/window to the porch so they can go outside and chill if they need to. The porch does not have an exit to the outside, so it is safe for them (except from each other :rolleyes:). I took the door out of the window because it was making the house cold. So, they won. I put it back in and put more insulation of sorts, around it. :rolleyes: They have yet to go there since the reinstall, but I am sure someone will eventually. I think I will take one cat out there and let her find her way back in.....
I will try the collars. So Amazon has them, eh? Is it Feliway that they put on the collars?