We have a american bull dog he just turned 12 months old he loves to tear boxes up and even eat some of then. This is the first bull dog we have ever owned We have had alot of dogs but one has never liked boxes!!!!!!!!!! Does any one have any answers for me. By the way it does not matter what kind of box. pa pa johns, baggies boxes, to just plain shoe boxes. They all get ripped up. Help any one. is this normal?