Trainer Needed For 3 Cats In Davison

I am looking for a trainer for my boss cats. She just recently let in an outdoor cat who is getting old in age. She also has two other cats that she has had for a while. The problem is that the outdoor cat wont go in the same litter box with the other two cats and just continuously goes to the bathroom on the floor. She has one of those robot litter boxes that self cleans so we dont think its a sanitary thing but we dont know. We are hoping to find someone who can help us with this issue so that she doesnt have to get rid of the outdoor cat!