If your cat is not neutered he is marking his territory. Please get him neutered ASAP! Neutered or not he may have a urinary tract infection which can quickly become fatal. I have one boy who used to get urinary tract infections frequently (almost lost him :cry: ). Now he drinks distilled water and only eats Special Kitty Urinary Tract Health dry food. No problems in a very long time. Good luck with a solution.