4 week old orpington was found in its cage with its other sister and appears to be hurt not favoring her left leg. At first we thought she was cold bc she was wet. We have her swaddled in a towel and we are holding her. She peeps and puts up a little fight. But won't stand. I looked at her left leg no apparent injuries. I have touched her foot and leg all over and she does not show any signs of pain. Any thoughts....?