Amen to the leash. That was my salvation in terms of fear of Gibby bolting out or jumping on visitors. After many months of making this the norm, he now sits and waits for the leash to go on and allows people in without immediately jumping on them. Naturally, he is curious after he is unleashed but he doesn't feel the need to jump up to get attention. With B's it sure does take months of reinforcement to get the concept identified but they will respond if you are consistent.