Chickens in the snow

I had read that chickens hate snow and won't walk around in it.  Mine must not have gotten the memo.

My buff Orpington has started laying, and we now get 3 eggs on most days.  Hers are a very light, almost pinkish tan.  The Australorp's are a light brown, and the Wyandotte is a darker, but still light, brown.  The other Australorp's comb and wattles are finally turning red, so hopefully she'll jump on the egg-laying wagon soon.  I keep expecting egg production to drop, since our days are getting shorter.  Everything I've read about chickens says that they need over 12 hours of daylight to continue laying (some even say at least 16 hrs).  Right now we get about 10 hrs, 45 minutes, and it's still decreasing.  I guess it's just another thing my chickens missed the memo about.