i make sure there’s always plenty of bones around if i leave and that seems to do the trick, esp if i buy the medium kind she can eat in a few hours and hand it to her right when i leave. and of course make sure he gets as much exercize as you can give him. make sure he knows he’s in trouble when he destroys things he shouldn’t. my groomer said pits get angry and act out when you leave them. its the only time mine acts up.