Yeah, they pretty much grab one another by some convenient bit of skin and start trying to roll around. The object is to fling the other ferret about, I guess, but it generally doesn’t work that way.
I’ve got a nice series of shots caught with Minion and Ares mid-tussle. Will be posting a series of them in chronological order (although they are spread out by several minutes between some of the photos. It was quite a fight).