Chicken survived predator attack but can’t walk

[calmeter]

I would keep an eye on her keel/breastbone for skin breakdown or pressure sores. It looks like that may happen. Padding might help.

So would I just add a soft towel underneath her breastbone?

 

[calmeter]

Does she move her legs at all? Sorry about your poor hen. I do hope that she recovers.

No she doesn't move them.

 

[Eggcessive]

So would I just add a soft towel underneath her breastbone?

Yes, something very soft and padded.