It is molting its perfectly normal
hope this helps!
hope this helps!
My Chickens Are Losing Tail Feathers Is This Normal?
If its the feathers right in front of the tail, then more than likely your rooster is a little aggressive with his girls and is pulling the feathers out when he mates with them. Mine are the same way. If you have a rooster then you can tell which ones are his favorites.
Do you have any cats/foxes/weasels/dogs around? If so, they might like feathers, or chickens but are just not quick enough