16 wk old hen is weak and passing loose, bloody poop quite often. She is an Orphington (buff) and my sweetest chicken! My chickens were all acting healthy last night, including her, but this evening, I noticed that she didn't come running to me with the others. She stayed where she was and just walked slowly. She is lethargic and wants to sit down mostly. She is drinking but I haven't seen her eat. Her comb is bright red, her eyes are clear and her nose isn't running. She's not coughing, sneezing or having any other problems that I've noticed. They're coop is a chicken tractor that I move every few days. I've brought her inside and made her comfortable with food and water in a cleaned up dog crate so she is away from the others. Its nighttime, so I don't expect her to do much but sleep so I cant really tell how she's feeling. Am I right in thinking that this may be Cocci? I will treat all of them for that with Corid in the morning as soon as the feed store opens just in case. Is there anything else I should be considering?