Beretta is giving me a problem I can't solve nor ignore anymore. When ever I am petting Remington she diverts my attention from him in any way she can. I ignore her and keep my attention focused On Rem and she starts biting me. Biting any body part she can get to. If she can't get to me, she starts biting him so he moves. I know he needs my time and attention and I don't want him left out of the petting, but Bereta is accomplishing her goal very affectively. It's very hard to ignore a dog who is litterally biting the hand that feeds her. What to do? Beretta is a 5mo old Lab.