Are leghorns not good with cooler weather? I have 4 hens, and 3 of them are absolutely fine with the colder weather we're experiencing here (40F) but the leghorn just stays put in the coop and seems to shiver when we force her outside. What's up with that? Also, her bottom is completely bare of feathers all of a sudden (no disease, we checked for that). Given that they are only 6 months old, they shouldn't be molting already...?