How to Stop a Car from Marking Cats mark to communicate with other cats. Cats often mark when they feel anxious or threatened. Some mark by spraying a small amount of urine. Others leave their scent by rubbing against objects or scratching. Scratching is instinctive for cats. The goal is to redirect them to scratch acceptable surfaces. Provide a scratching post or pad, depending on your cat’s preference. Spay or neuter your cats before five months of age, or as soon as possible. Pay attention to behavioral signs of stress, and provide extra support. Cats become territorial when they see guests’ belongings or new purchases. Seek medical attention if you think there might be a health-related issue. Clean any previously marked areas thoroughly to avoid remarking. Urine marking can irritate your lungs, so be sure to address the problem.