One of my four Rhode Island Reds is losing feathers ALOT. Last night I touched her and they came out in handfuls. They are missing from her neck, back, belly and rear. I didn't notice so this came on suddenly. They live outdoors in Michigan and I've been keeping them in the coop all day. I thought the feathers I had seen were from them picking at each other, being restless, but see now it's the one hen. I read some posts about molting, giving extra protein, Poly-vi-sol and yogurt. I'll try those things tonight. Since my girls usually run around the yard, i've never noticed molting before. I also read up about mites/lice. I haven't used a magnifying glass but don't see evidence of gunk on the feathers. Her belly is absent of feathers and has a red irritated patch. I had previously had two of the girls without feathers on their heads and had used Blu-Kote to cover the red. Should I do that over a larger area? I've brought her inside to isolate in case she is sick and in case she's getting picked on, so she will be warmer now. Any advice? I'm very concerned!