I had a friend give me his last two hens. The others picked off 2 by 2 by a predator, he started with 16. A rir & br. I have had them in a pen by themselves for a couple of weeks and they are healthy. I treated them for mites (DE) as over the summer some of his birds were in horrible shape-feathers missing from butts etc. These looked OK but why take the chance? Well I then had them over the coop in an enclosure for 2 days. So I thought I would put them in with general population this evening. The br was being harassed horribly and she seemed to be gasping for air. I thought she was gonna have a heart attack so I picked her up and dropped a drop of water in her mouth. She was then choking and so I turned her upside down and blood came out! she choked and gasped and coughed and a little more blood came out. What did I do? How can I help her?