When a female cat goes into heat, she marks objects with urine to let male cats know that she is looking for a mate. Cats in heat will spray walls, furniture and almost any vertical standing object, and this urine has a much stronger odor than normal. While spaying is only way to stop a female cat from urinating around the house, there are other steps you can take to help discourage her.
Reduce your cat's stress level. Stress can cause cats to mark their territory more frequently. Do not overcrowd your cats by having too many pets.
Use cat pheromones to help keep your spraying cat calm. These products can be placed in common problem zones and are also available in plug-in diffusers.
Keep your cat's litter box clean. Cats in heat produce more urine, so maintaining a healthy litter box will help keep your cat from urinating outside the box due to sanitary reasons.
Clean urine stains thoroughly. The smell can trigger additional spraying responses in cats.
Have your cat spayed. The only way to keep a female cat from going into heat -- and urinating on objects -- is to have a vet surgically remove her reproductive organs. Spaying can also help prevent certain diseases, such as breast cancer.