Your little one sounds like a little fighter. It's a very lucky baby to have someone willing to give it a chance like you are. I hope things continue improving so you don't have to face the difficult choice of culling.
I'm sorry there wasn't much of a response to your threads as well. It does seem like sometimes BYC is less active than others. I can see why that would be discouraging when you have an issue with the little ones like you are dealing with.
My little one is in the house for now with the buddy. I had him/her out with the rest for awhile but with the cold nights I felt like that one being smaller and less able to get in the middle of the silkie pile would be better off inside. When the nights get a little warmer I'll probably make a place for that one and a buddy outside. We'll see how it is doing come the cold again next fall/winter and I'll decide if it needs to spend winter indoors.
I'd love to hear the name you come up with for your little fighter when you settle on one! I'm always terrible at naming mine. I call my little special needs one Stumpy.

The legs looked somehow shorter to me when first hatched and that was before I figured out how bad the leg issue really was. Now I feel kind of bad calling him/her that but it just kind of stuck as I'd already been using it.