My bantum hen has runny poop. She has had this for about 3 weeks now and I'm not sure wat to do. She has stopped laying eggs but other then that she acts normal. Today, she looks like she might be beginning to molt and has small bald spot on chest. She comes out of he coop each day with the other hens, free ranges and has normal appitite. Not sure what is causing the diarea, should I give something to her?