My speckled sussex was born April 7, so she is an older chick. I noticed this morning that she wasn't acting like herself. Now I noticed that she feels hot when I put my hand on her back and the others don't feel that way. And she is making like gagging motions with her head. She has her feathers kind of puffed up too. She also acts tired. Any ideas at all what is wrong or how I can help her? I don't want her to die on me.