Hi yall! I noticed one of my lavender hens was down to only 2 tail feathers. O checked her ( named Billy Bob by my 6 year old ) and she has no signs of mites or lice. There's no raw skin or redness. It almost looks as of they were broken off. Could this be a self induced thing? She's healthy and happy other than that. First time chicken owner so just wanted to check with others. Also have not seen anyone picking on her either.