[yorkietalkjilly]

Goodness. Max just got there! He's not dominating, he's just feeling anxious, hyper, excited and maybe a little uncertain with this big change in his little life and coming into a strange home. He likely wants Toby's things as they have his scent on them and they are comforting to him due to the scent and he probably took refuge under the table and bit to make it clear to Toby he's no pushover and don't push him. These are common things a new dog might do to stake out his claim when he's new to a home with another dog in it. I'd cut Max some slack until he's had time to settle in and not think he's being dominant unless he stays this way for the next few weeks. If necessary to de-escalate things, crate him with a treat-filled Kong toy and some of his own toys or chews so he can stay in there safe and secure(remember, he's the new guy and likely very unsettled) and observe all the comings and goings of the new surroundings. If he cries when you put him in there, ignore him and only give him attention or look his way when he's quiet.

Try to let them work this out on their own - that's the way of dogs, using teeth and stealing things and playing hunt/attack type games and it can get rough. Keep stepping in to stop the really mean things he's doing by walking over to him with stern look, walk into him until he backs off and stand there over him until he turns away and gives up. In the meantime, read all that you can about new dog and pack behavior on the internet and in dog books and learn how normal all of this can be when you choose to get a second dog and they are trying to form a pack.

If he keeps on trying out all of these things, post about it a couple of weeks from now and we can help you with how to use positive reinforcement and Nothing In Life Is Free to help re-shape his behavior and any tendencies to try to dominate.