FarmVille unreleased Beaver and Weasel spotted in the wild

Beavers and weasels have been creeping onto farms, even though these animals have not been officially released in FarmVille. Not sure if these will be part of the new Mystery Animals game discussed in this week's FarmVille official podcast (FOP, for short), or if they'll just show up as part of a some undisclosed theme (tiny mammals? adorable rodents?) in the future.