Bears are excellent problem solvers.  If they want something they will figure out a way to get it.  A friend of mine is an animal trainer and last winter he had a black bear cub.  I was amazed at what that bear could do.  It was very smart and it would get frustrated if he couldn't do something and he'd keep trying untill he got it.  Josh had gates up at all the doorways to keep the bear in the living room.  He soon found out he could climb over the gates.  Then Josh put electric fence wire at the top of the gates and the bear figured out how to climb over without touching the wire.  (You need to Login or Register to view media files and links)