How do you treat diarrhea in a chicken? Seems a dumb question for someone that has had chickens for 20 years but after reading many of these threads, I'm amazed that my birds have lived as long and as well as they have! There is so much I DIDN'T know! This two year old standard cochin hen has developed diarrhea. I noticed her butt was dirty & matted the other day and that she wasn't walking around. As a matter of fact, if I hadn't spent the day working in the garden beside the pen, I may not have noticed anything was wrong. She seems alert and can walk normally but chooses to sit in one spot. She is kept with 29 hens & 2 roosters in a chicken yard with a diet of hen scratch & layer pellets with oyster shell available; and all the garden & kitchen scraps available. I did check the list to make sure I hadn't fed something toxic to birds and can rule that out. I cleaned her, noticed that she is very thin of feathers back there, and then put her in a cage where I have been watching her for 3 days. The diarrhea is worse but not bloody; just watery. Her demeaner seems the same. I keep her butt cleaned, keep her dusted for mites. Her demeaner has not changed - she seems alert and can get up and move just fine when she needs to. But she prefers to lay beside the waterer and drink non-stop - obviously she's dehydrated from the diarrhea. She wasn't eating the scratch but I have put layer pellets & crumbles in with her. She may be eating that (it was gone this morning but a mouse could have found my new set up, so not sure about that.) Obviously, she's not producing eggs but she doesn't appear to be blocked. I can't find any sign of tightness or bulging; she is under weight. Any suggestions would be greatly appreciated!