Could you please make it clear at the top of the page somewhere that scent marking is a sign of stress. Stress can be caused by many things that have been mentioned here, sickness, moving to a new house, another animal in the house, and I could go on. However, scent marking is NOT misbehavior! Misbehavior requires a retained knowledge of right and wrong which has nothing to do with this particular problem. Simply put, your cat is just being a cat and it’s up to you to use your brain to figure out what is wrong and fix it. Thanks