I recently purchased several girls from an auction. I have 4 cornish pullets. One of these young ladies is very weak-legged. When I placed her in the pen for her 1st night she "crawled" ( best way to describe her moving) to a corner and hid. When I picked her up to check on her later she was not very happy she sqawked loudly like she was sore. I separated her from others but she still moves very little. She does eat and drink and will respond when i stroke her a little bit. Her poo is a greenish color. She sleeps at night and some during the day , but when she hears other chickens walking under her she tends to perk up. ANY SUGGESTIONS WOULD BE GREATLY APPRECIATED!!!!