Sounds strange but she really looks like she needs to strap that chest in I have no idea what is causing this. I received several 1 yr old hens, all laying well, they were somewhat wild and kept in unsanitary conditions. This "condition" seems to be getting worse. I've noticed a couple more hens may be starting to develop this also. The chickens were quarantined from my other layers for about a month. Other than being skittish, they have settled in, however, my other hens will fight with them. They don't readily mix. It's been about 2 months since they were rescued. They are now free ranging, very clique-ish and do little mingling with my other flock.any thoughts?