cat poop & puppy


I have a 9 month old lab/rot mix & also have a 5yr old cat. I live in a 3bdrm 1bath trailer & unfortunately my laundry room is shared with my bathroom. so I only have one spot for the litter box & it's in an area with a cupboard door which my cat can open but now my dog also knows how to open & he eats the cats poop ON MY FREAKIN' COUCH 😡😡😡 I clean the box daily & I've disiplined my dog. I've also given him toys but he destroys EVERYTHING within a matter of 5 minutes or less. so he's bored bc he has nothing but the cat to play with when he destroys all of his toys. idk what to do. HELP lol