For sure I would keep them separate if you think buddy will fight over it. Put him in the backyard or his crate. Get Patches a bone for herself, just a smaller one. Once Petey gets a bone....he usually chews on it until he is done. If he isn't in the mood, he will try and "bury" it some where in the house...like under my pillow!!! I usually buy smaller bones and Petey finishes them, so I never refreeze, maybe someone else can help you on that one.
Carol
Carol