Hi I am fairly new to chickens. I got my chickens last Nov. so they are a little over 10 mounths old. One of my B.R. has stoped laying, her comb has shrunk, she is missing her tail ,and I see feathers in the coop and run. The coop and run are not covered with feathers like I have seen some posts describe. The hen seems to be the boss in the coop, so I do not think the others are picking on her. No roster, so its is not the result rough passion. , She seem to be eating and pooping ok and other than the egg laying everything seem normal. Could this be a molt-- I have seen posts that say they dont do it till they are abour 18 mounths or so? If it is a molt how long do they usuly last?