I have been watching my 2 1/2 yr old barred rock hen get more and more lethargic over the past couple of weeks. Sunday she would hardly stand up before she sat back down. She was still eating if I put the food close enough for her to reach. I removed her from the coop so I could watch her more closely. Her poop was watery and all colors, yellow, brown with some yellow and white. Monday she hardly ate at all, even previously enjoyed treats. This am I got her to eat some yogurt and blueberries. She seemed to be drinking water OK. I took her to the vet this afternoon. He felt she may have a calcium deficiency which was causing her general weakness. He could not find anything else wrong. He did say birds were not a large part of his practice.(No Kidding). His solution was to give her several injections of a liquid calcium sub-q. I took her home and with in less than an hr she died. This makes me very sad but worse is that I still don't know what was wrong with her. I have another hen starting down this same road. Any ideas anyone? Many Thanks