is my hen broody? she is a silkie so she gets broody a lot i guess. she has been sitting in the nest box constantly for the last 2 days and making these weird cooing/purring sounds whenever i open it. her chest and stomach is bare of feathers but there arent really any feathers in the nest box. she dosent fight when i pick her up she just stays still and coos. she hasn't layed any eggs since she started this behavior. can she raise chicks in winter? it gets to be about 15 F at the coldest here and its usually above freezing.