My oldest cat is very moody, and will often lash out with claws and hissing towards me or my wife. He is often peeing outside the litter box, on the walls, in corners, in the laundry basket, etc. We've ruled out a UTI, but he did have one early this year. He is honestly getting to be too much to handle, and no one seems to know how to make him stop acting like this. I really need suggestions. I live in a rental property, so damage is something I need to avoid at all costs.