HELP! Dog "played" with chicken

I was sleeping 35 mins ago, dreaming of chickens (literally) when I hear some unusual sqwuaking. I yell at the bf to go check on the chickens because somethings not right. He runs out and finds the dog playing with them. I've told him a million times, if the coop door is open, the dog needs to be INSIDE, the dog is nice to the chickens but he is young and curious and thats dangerous.

Well, my poor RIR hen was the one that got the brunt of it. From what I can tell she has no wounds but has ice caked on her so she must have been in the snow for awhile. BF brought her and another hen who was lying on the ground into the coop and came and got me. He told me one was hurt real bad so I was picturing lots of blood and possibly a mercy killing. When I got out there, the Buff brahma was up and at em and looks fine, a bit tuffled, but my RIR was just sitting in the corner, not moving so I checked her for blood and brought her in. No blood, doesnt look like any wounds but I thought i would warm her up first before doing a full check, she has snow frozen to her in places.

She is now in a cat crate with a towel on top of her near the furnace.

Should I keep her near the furnace or near the space heater? Is the forced heated air too much for her?

What do I do??

Small miracle it wasnt my favourite hen, the other RIR. My heart just stopped when he said one of the RIRs was down, I thought for sure it was my special Little Buddy

 

And to mention, one of the big mean Columbian Rocks immediately started attacking her viciously once bf brought her into the coop, they are such mean old biddies, they are going to freezer camp as soon as these chicks hatch I think.

 

Well she's been in the cat crate all day, she started drinking water and standing up so we brought in the larger dog crate and tried to entice her out of it. Just waiting for her to go from one crate to the other, we have the doors facing each other so whenever she is ready...

She has eaten some banana so she has an appetite. Her feathers do not look good though, I will give her another day or so to see if she preens herself and it looks better, but maybe she will need a shower?? We dont have a bathtub. Maybe a sink bath?