The man next door to us threw moth balls all over the place. PU! But... it's kept the cats from crudding all over his flowers. Maybe you could take a moth ball and (with gloves) rub some of it on the outside of your cat door? I'd be worried about ants if I rubbed a piece of fruit on the door. You definately have a problem. Is the annoying cat a stray? or a neighbors? You might mention it to the neighbor. Afterall, communication is everything in life. Please keep us posted. I'm curious how you work this out.
BTW, I'm new too
