They could run together. They will have to establish who's the boss though. They may fight a few times over the first few days together, but they will sort it out between themselves. Once they do, they will get along. And it just may take the focus off people. Give it a try while your out there, and only let them go at it for no more than a couple of minutes at a time, then seperate them. Sometimes it only takes 1 or 2 scuffles till one settles for shotgun and let's the other drive.