Does he have a job to do? Or is he just a pet that goes outside to play and then back inside? Brittanys are hunting dogs, and high energy ones at that. I would suggest finding him a 'Job' to do, be it just nose games, or a doggie backpack on walks(Loaded down with water bottles) or even agility or flyball. It sounds to me like he's bored, and is finding ways to burn off his energy.