I think I've seen something like this before, like when someone wins a wolf in an in-game auction, and their den is full and then they have -1 spaces, or something similar.
Do they become "locked" and you can't use them until there's enough space (either by FRing, retiring, selling, or buying a den expansion, or swapping back to the spec.)?
I'm just a curious basic member who's thinking about buying themself a premium membership soon, and I wanted to know a little bit about the specializations :)
Many thanks in advance!