I have 2 your old buff Orpington and Australorp mixed hen that lost weight and is not walking well. I looked her over and her eyes, nose and comb look fine. She is alert and acting fine. Pooping ok. Eating and drinking. Background of the poor girl. She is at the bottom of the pecking order in a 18 chicken flock, 1 roo. I have 1 hen who is a complete bully along with her friend. They, along with several others peck this poor hen when she tries to eat or drink anything. Yesterday, me and my husband went outside to give the birds a treat noticed that she wasn't with the flock. We went into the coop and saw that she was hiding behind the poop tarp under the perch. When I picked her up, I was shocked how much weight she had lost since September. (I work full time now and can't get out to see the flock much anymore) we immediately brought her in and checked her over, gave her food and water, which she ate like she hasn't eaten in days. We also noticed her legs seem weak. She is walking funny and keeps resting. Her crop was empty when we brought her in. As she ate and her crop grew, it seemed more squishy then when my birds have full crops. Not sure what's going on. Would appreciate some insight!