Molting Hen Help

Hello there everyone! I hope you're all having a great winter season!

Well here's my problem,
I've got three very bald RIR Hens and I don't know what to do! It's been getting very cold around here lately, down to below 0 at night. During the day they seem fine, but I worry about them at night. They've got almost no feathers on their backs and under their wings! Their necks are starting to look a little naked too. Is there something I can do for them in the time it takes for their feathers to grow back? I've heard everything from feeding them different kinds of foods to making them little sweaters. Then some people say they don't need anything at all. But it gets so cold here, the temps are going to be around zero during the day over then next few weeks, I just hate seeing them so bald. So what's the general BYC consensus? Thanks everybody!

 

Thanks! I've been making them warm mash with a little milk and old apples and canned veggies that they really seem to enjoy.
And that saddle idea is magnificent! Maybe a few of those made out of fleece would be good for my girls...
I'm open to any other suggestions too!