Still new to everything chicken. My adult chicken has stopped laying eggs for about 2 weeks now I noticed last week before we went out of town that she had started losing a few feathers. Got back in town yesterday and noticed she has lost quite a few feathers. She is still eating just fine and seems to be her usual sassy self but I know something must be wrong. It has gotten a bit colder recently and I started giving s new brand of treats but other than that I don't know what's changed.