You know what Scott, after i wrote that i was thinking about the hobs, and you are totally right, as you say, they would be a solitary creature, but then ferrets have been domesticated for a long long time, so maybe that alters it . . . . . ???
Certainly most ferrets i have come across are pretty social, playful animals, that seem to thrive in a community. . . . .
But your right about those polecats mate