I've been out of town the past five days and had somebody watching my birds for me. I went out to the coop this morning to let them out of their run and noticed one girl walking very slowly and her feathers were puffed up. She took a short sip of water and pecked at the food, but didn't eat. I've got her laying in a cage inside now and she seems to be doing worse. No longer standing or lifting her head. I've given her some water from an eyedropper. Her poop is normal. I had two chickens die a couple of months ago, one was fine and I went out the next morning and she was dead in the coop(She was born with a crooked beak so I suspected a genetic issue at the time) but then a couple of days later I had a hen die. I'd only owned her a month and she always seemed sickly, but I thought maybe it had been the conditions she had been kept in before. After she died I gave the rest of the flock medicated water for a few days and dusted them. I haven't had a problem until now.