Our only problem is aggression when Ben "steals" something like a sock or hand towel. You can tell he's very pleased with himself when he finds a stray sock or manages to sneak in the kitchen for a towel from the counter. But, getting it back from him is tough.
So last night we tried just scolding, and when my husband reached for the sock, Ben actually bit him. We have always tried to make sure Ben knows his place in our home. He doesn't sleep on our bed, or even in our room. He doesn't eat table food. He's required to sit before getting a bone.