Do a deep cleaning. If you've recently moved and your cat has just started spraying, it may be that he smells traces of other cats. Dr. Borchelt recommends scrubbing the rugs with a combination enzyme and bacteria cleaner, like Outright Pet Odor Eliminator or Nature's Miracle. The enzyme in the cleaner will dissolve old urine crystals, while the bacteria devour the residue, he explains. Keep him calm.
Cats sometimes spray in response to change.
Keeping his schedule consistent will help prevent problems before they occur. In spayed females the success rate is even higher, about 95 percent. Vets recommend having kittens neutered at about six months. Sometimes, however, spraying is a warning sign that something is wrong physically, like diabetes, a blocked urethra or a urinary tract infection. If your cat has just started spraying or is suddenly straining to urinate or urinating more often, don't take chances, advises Robert J. Watson, D.V.M., a veterinarian in private practice in Toronto.