Hi Kelly, if this doesn't work out for you, I understand that clicker training can combat a whole load of problems with animals. It is usually used for dogs but animal behaviourists are recommending it more and more for cats, especially when there is competitiveness amongst them and they demonstrate insecurities. I guess it may be easier to implement in a one/two cat household though. There are some books on the market that may help you or you can search the internet. Good luck.