At my wits end. We have a lovely cat who exits the house via a cat flap in the back door. The problem is that a local tom routinely comes in the cat flap, eats all our cat's food and pisses everywhere! It even goes so far as to get up on the work surface and piss on the toaster! The whole kitchen stinks and whatever I do I can't seem to get rid of it. Our neighbours seem to have the same problem despite having an electronic cat flap activated by their cat's collar - the invader seems to have found a way to get around it. I'm on the verge of hiring someone to lay in wait, trap it then castrate it. Does anyone have any less drastic suggestions? Really don't want to have to lock our cat in all the time mainly because he wakes is in the night demanding to be let out.