By "box," do you mean cardboard box (eek!)? Or is he really in a crate (metal/high grade plastic)? If he's in a cardboard box, that might be why he's eliminating inside...
If he's in a crate, you have to somehow have him realize he's supposed to sleep in there. Maybe entice him with a treat when he's tired? Make sure you're letting him out every two hours at least.
Good luck! |