Steve...that is my worry. Around Madison, we had heavy wet snow in early December and it promptly froze solid. No more acorns or spent grain available. Now, we just had another storm that swept the country. Not much snow here from that storm, but we had a bunch on the ground already.
The storm did give a fairly substantial rain fall, however, then hours later the temps were 0 and below, so there is undoubtedly another crust of ice covering everything. Browse will be the sole food source this winter.
I believe the animals can take the cold...as long as there is food available. Orion is right, we have had a bunch of lame winters and no die off to speak of except in a few places in the NW with lake effect snowfalls.
This year is maybe the first in..... well ...years when we had snow cover since the beginning of December at least and non-stop so far.
Deer I have seen lately still look great, and there are turkeys all over the place, but it is not yet February.
ChuckC