Hello, I have a sick hen that’s not eating and pooping yucky stuff. She’s not doing well. She’s very light. I’m not sure what’s wrong with her. I bought this big treat block that had some big pieces of corn in it. It seems all of my chickens started having diarrhea after they were eating it. I removed it when I noticed that. Seems like she has been sick since. What can I do for her? She’s not doing much of anything.