esp. raccoons. i have a tractor. nest box doors/windows are shut with a wooden block swiveling latch. can a coon open that? also, the pophole door...can a coon break/chew through braided poly? it would have to first get in to the bottom floor by tearing off chicken wire, then get a grip on the bottom edge of the pophole door while it's closed, then pull it hard enough to break poly twine or chew it apart. then the line for the pulley would break abd the door would fall open.