Toilet trouble - senior cat
My 13 year old neutered tomcat who has been as good as gold since kittenhood when it comes to lavatory habits has recently started soiling outside the dirtbox. I have the dirtbox in the downstairs toilet, the door is always left open when not in use but for the last week or so every night he has been doing his number twos on the floor at the bottom of the stairs or in the hallway. His stools are normal, as firm as they have always been so it's not as if he has a touch of the 'Ertha Kitts' and can't make his dirt box on time and nothing has changed in the house that I can put my finger on to make him start having these accidents all of a sudden. Any advice given would be greatly appreciated.