Hhmm I tried to edit my post and lost the whole thing lol, here it is again:

Deep snow isn' t all that much of a problem by itself, however long periods of deep soft snow where they can' t walk around without sinking real deep combined with really cold weather can affect them for sure. In my hunting area there has been 18-24 inchs of snow since the begining of the year and I can still see where they have been getting around. They will find areas to feed and things to eat even if they can' t dig through all of it.