Territorial marking or spraying by cats is a whole different subject, as you will soon learn, if you haven't already noticed.
So, you've eliminated all of the above potential causes, and your kitty is still indulging in his perverse activity. It could be that he is not urinating "normally", but spraying, or marking his territory. This is common, particularly among un-neutered mature male cats, and in some male cats that were neutered after reaching sexual maturity.
Spraying or marking territory involves a distinct posture not found in normal urination. A cat will back up to a vertical surface, stand with his tail quivering, and direct a spray of urine on the wall or other vertical surface. Often he will make little mincing steps in place while marking. He will then leave the area without sniffing. (He's made his statement and knows it.) This behavior is not limited to male cats, as females will also sometimes spray, but for different reasons.
Marking, like inappropriate elimination, may be triggered by psychological reasons or by the more prosaic. I recently read a list post by a woman who, in a tender "togetherness" moment with her cat, had him back up and spray her leg. She treated this bit of indiscretion with good humor, as she realized it was her cat's way of marking her as *his.*
¹"Doors or entranceways frequented by you or other cats may be marked. Placing urine on stoves or vertical surfaces is usually a type of marking behavior. Often, objects that smell like you such as bedding or laundry may be marked. Marking behavior can be triggered by stress or anxiety. One example of this is the cat that picks up cues that the owner is preparing for a trip and urinates in the suitcase. Another example is the cat that marks a piece of furniture after a new cat is introduced into the household."
Treatments for this type of behavior needs to be individualized to the cat and its particular circumstances. Usually, the treatment revolves around modifying the stresses in the environment or trying to modify the cat's response to them. In some cases, anxiolytic drugs may be prescribed to help the process. As with all therapies for behavior problems, the treatment plan may evolve as the therapy progresses.
There are two commercial products designed to discourage territorial spraying by cats. I have reviewed them here.
¹From the FDA Veterinarian web site. Used with permission
Read Further: So how do I retrain him?
