I have a nasty stray cat that I cannot seem to catch. It's a big burly orange male that has attacked my calico several times. It walks around the house at night doing that deep gutteral meow. It peed on my back door where our cat door is. I'm sure most of you know how male cat pee smells......WOW! I've put out the have-a-heart trap with tuna and smelly canned catfood and had no success. I'm loosing my mind. What else can I do?