good point about the lid-less box, aggie.

If a cat's been having to fend for himself and was in a crate and stressed, I'd imagine the last place he'd want to go and relieve himself is in a shape similar to a crate. But I'm assuming the box has a lid. Is he in a room by himself with the litterbox? that might help initially in getting him to use it.

Is he your new house mate?