I have a Jersey Giant and recently her glossy, gorgeous black feathers have turned dull and have been falling out by the handful. She doesn't have any bald patches; rather she has quills with bits of feathers that look like they might be growing in. This is my first year raising chickens. What I want to know is if it's possible that she's molting? If so, why would she do this at the start of the coldest months of the year?