I have a 12 year old son that wants to start hunting. I thought about starting him on some squirrel hunting w/ a shotgun. I'm not really much of a hunter myself. Would he be better off hunting squirrel w/ a shotgun or rifle? I envision walking thru the woods w/ him and taking squirrels on the move w/ a shotgun as compared to sitting by a tree patiently to take them w/ a .22 rifle. Seeing that he's young, sitting still is a little tougher.