Is it possible for weasels to get fat?

I know weasels have really high metabolisms, and pretty much any weasel you see is really lithe and slim, but I was wondering if they can ever get fat? I'd imagine the larger species of weasel probably can, but what about the really small ones like the Least Weasel? Can they ever gain a significant amount of weight, or does their biology pretty much preclude it? Has anyone ever seen a fat weasel? And would an obese weasel ever occur in nature, or would they pretty much have to be pinned down and forcefed lard?