This is my first year of having hens and one of my hens looked like she was sitting my the middle of the yard asleep. This is my first sick hen. The hens usually follow me around. I picked her up and she has an odor to her. She has clear liquid coming from her nose. I have her under a heating lamp isolated from the other hens. I think she has a cold. What can I do to make her comfortable and help her get better.