Last Sunday I had to start my hens on antibiotics for a respiratory infection. Everyone seems to be clearing up and doing well until yesterday. One of my barred rocks have quit eating. She seems sad. I have checked her over very well. Eyes nose and mouth are clear. No mites and doesn't seem to be egg bound. She is young and hasn't started to lay yet. She has nibbled at some cooked rice and yogurt as well as some cucumber and tomatoes. I'm very worried. Also her poo looks normal.