One of my RIR hens has lost feathers on her back, some are broken. She also has a wheeze when she breathes and a sneeze/cough. One of the other RIR hens also is starting to have the same thing with the feathers. My rooster has started loosing feathers on the back and front fo his neck to the point of being bald in spots. He also has a sneeze/cough. I'm not sure what this is, I started putting ACV in their water but I'm not sure how to help them. Any thoughts on what this is, or how to treat it?