HELP! Both my 2 1/2 year old cats have been spayed and neutered and I have had no problems with them urinating anywhere except the litter box - except the day I accidentally left the door open to the guest bedroom - the only room in my home they have never had access to. I assumed it was the male that urinated and figured I might as well leave the door open now that it was "marked" but it happened several more times and I'm not really sure where. (Just read about the blacklight flashlight. What a great idea for locating the stains!). I am so naive. I didn't know "fixed" cats marked their territory - nor did I know female cats do it, also. My major problem now is that I am having my entire home recarpeted soon and don't know what to do. Will they mark the entire house????