These behavior changes often become annoying to owners, and sometimes owners think their cat has some unusual illness. Some female cats will urinate more frequently or may even spray urine on vertical objects (marking) when they are in heat.The urine contains both pheromones and hormones, both of which act as signals of her reproductive status to other cats. This is the reason that queens in heat attract intact male cats.hese behavior changes often become annoying to owners, and sometimes owners think their cat has some unusual illness. Some female cats will urinate more frequently or may even spray urine on vertical objects (marking) when they are in heat.