miss_thenorth
Frugal Homesteader
You could try yogurt, and keep an eye on her. Also, look at this post, and see if you might have a poisonous plant in your yard.
http://www.backyardchickens.com/forum/viewtopic.php?id=267893
http://www.backyardchickens.com/forum/viewtopic.php?id=267893