Both dogs grab one end of a bone, and play a tug of war/dance together. It's all play; no growling or aggravation allowed.
Here's a few photos of the two in play:
|You get one end; I'll get the other|
|No, we're not kissing cousins!|
|Whose turn is it to lead?|
|Didn't they do this in Lady and The Tramp?|