Hi! I have a 13yr old neutered male cat and a 6 1/2 month old not-yet-spade female cat. Recently I've been noticing a strong odor in the living room of the house as soon as I walk in the room. I have looked and looked and haven't seen anything that is a tell-tale sign of spraying and I've been on my hands and knees sniffing around the room to figure out where the scent is located but have had no luck. Is it possible one of them has sprayed? Could it spraying going on in another room with the odor 'drifting' into my living room? Do female cats spray? I know males do but I had been told that they wouldn't after being neutered.