I have 3 cats, 2 girls and one lad. They usually get on really well together, but recently my boy Archie (who is 5) is being very naughty! He is constantly spraying all over the house and has started to become violent to one of the the girls. I have bought a feliway but it doesnt seem to have any effect. He has been neutered and is usually a very calm and passive cat, I have no idea why he might be being so naughty at the mo!! Does anyone have any advice or explanations as to why he acting up at the moment?