Help! I just noticed two of my chickens have feathers that are broken/missing on their lower back. I just got back from the feed store and I purchased some DE and some Pick-No-More lotion that is made out of aloe, tea tree and coal tar. I haven't seen them picking at each other, but it was inexpensive and natural so I thought it couldn't hurt. The lady there said that it could be lice and the DE won't kill lice, and suggested some nasty chemical powder that I didn't get. I feel so bad because I thought they were so healthy and happy! Is there a natural way to treat lice if that is the case? What else could chewed up feathers on their lower back be from?