Just to narrow down the problem, I would suggest getting a brand new box with brand new litter, and confine your cat to a room with that box. If the cat uses the box then that may tell you that he needs his own box and if not then at least you'll what is NOT the problem.
When you use the words "punish him" you have to be very careful with that because chances are that your cat may have no idea what he is doing wrong when he gets punished.
Good luck.
When you use the words "punish him" you have to be very careful with that because chances are that your cat may have no idea what he is doing wrong when he gets punished.
Good luck.