We have a 3 week old chick who has pretty much stopped eating and has become slow & listless. She is shaky on her feet and we noticed today that it almost looks like she has hemorrhoids. Her poop looks normal and isn't runny or discolored. Has anyone seen this before? If so, what are the common causes and how do we fix her up? Her 9 sisters all look fine and are growing like crazy - she is the only one who hasn't grown much since we got her and is now showing symptoms of being sick. Thanks in advance for your help!