My 2 1/2 year old male neutured cat is not using the box anymore. I have 4 cats total and it's just him that is a problem. I have 3 box's as well. 2 downstairs and 1 upstairs. They stay clean etc but he's still refusing to use them. I bought the Feliway today and put it in the room(s) where he's soiling. It's just areas where there are carpet in which is my great room and dinning room. What else can I do? I've heard about putting him up in a bathroom to retrain him but that just seems cruel. Any suggestions?