Another chicken with problems. My RIR (Miss Rustie) is getting very thin. We got some new chickens the saturday before Christmas and I didn't quite follow the instructions on introducing them to my originals. I added them to the pen all at once. Miss Rustie is part of my originals. She is the runt, gets picked on (always has by the other originals), and has always been by herself. She eats, but not sure how much and drinks. Her crop is VERY thin as well as her whole body. Her feathers to me seem to have lost their luster. I put her on the back porch in the LARGE dog crate tonight with nesting, food (layer & scratch), water etc. She ate what i thought was quite a bit (making a mess all over) and drinking. Covered the cage with a tarp and blanket to help keep her warm. I am thinking that she is stressed from the new birds and not eating much because they eventually push her out. So hoping she will fatten up being separated. Any ideas of what i can give to help fatten her? She is one my pickier eaters. Was thinking of getting some baby formula for her or Ensure. Going to give her eggs in the am and some oil. I have searched through the site and don't find too much about a thin or empty crop. Everything seems to be on a swollen crop and doing surgery. Accepting any suggestions. Thank you.