Well now, that's a tough one! I guess it all depends on her normal schedule. Is she really sleeping more, or are you just paying closer attention to her to see if she's ok? Fortunately my two have never really been sick (quick, where's some wood to knock on!) so I can't give any other clues beside not eating, drinking or acting normal. I'll guess you'll have to wait for some more experienced advice.

Sounds like Edwina and Tubby concur on their dislike of snow. "Oh, it's sooo cold." as he flips his paws to get the dreaded snow off.