Female Cat In Heat Marking. Urine spraying is a way that cats mark their territory. Illness, pain and litter box avoidance can also cause a cat to spray.

While it may be a behavioral issue, she may also spray because of. Instead, your cat may become extremely affectionate, often rubbing against their owners or rolling on the floor to solicit affection. Often, they spray outside of the litter box or spray vertical objects like walls, furniture, and trees.