If we are raising chickens, we might not aware that chicken plumage falls down on daily and falling increases at a certain time.
Based on internet resources that temperature is the main factor to cause falling of chicken's feathers.
As temperature lower during Fall and Winter seasons, the chickens are molting, might be like leaves falling down from the trees.
Moreover, another factor that "broody chickens may begin to molt once they have finished caring for their chicks."
So, we no need to worry or wonder, because chickens molting is a natural process. The old feathers will be replaced by new ones.
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