Over the past few days I've noticed that a couple of our hens (Ameraucanas) had some blood smear on their eggs. It seems like this all started around the same time. We lost one last evening when we went out to take care of them. This hen had lost some feathers on her back above the behind area. Her butt was all bloodied and swollen when we found her. Now we've got a couple more Ameraucanas looking like this. I'm feeling pretty helpless as I'm no vet and I'm not sure what's going on. Why did this start all at once with a few of them? They must have laid eggs today as each day we've gone in and collected our eggs and they keep having blood smear. So I'm thinking they've already laid an egg. Ergo, they wouldn't be egg bound. But really... Now we're talking a few hens all at once with a prolapsed vent? Something fishy is going on here. The only new things we've got going on are that they've recently been moved to a new coop, we add neomycin to their water to treat our rooster's cold, and their bedding was becoming sparse so we added more to make sure they have adequate place to lay. We plan to clean their coop out fully and replace with new bedding tomorrow. Any ideas or help is appreciated.