Iam using the feliway spray and waiting for the diffuser to arrive, but since I contacted you there has not been anymore spats between them. I always feed them in different rooms otherwise Toby would eat Yanni's normal food and not the the prescription food as he prefers that. I think that is part of the problem as he thinks Yanni'Ssnormal is getting preferential treatment. Also he has his own routine such as he always comes up to the bedroom every morning for a cuddle when he has his medication and then in the evenings he has his special place to sleep or next to my husband where he lies back and has his tummy rubbed. She sometimes buts in as she is a demanding cat and then he waits to get his own back. Usually though they get on well together it is just that when they do fight they really fight.