One of my barred rock pullets who had been fine for the first 7 weeks of her life suddenly couldn't work her left leg. I could move it thru its range of motion easily with no pain No swelling, no injuries I could see. Over the next few days she lost the ability to walk. Her right leg got sort of spastic and tight but then loosened up. She stands splay legged and now often gets a wing caught under a leg. She's eating and drinking fine. She seems better now (it's been a week) because she can stand up taller. But she still can't walk. She still has no swelling and no obvious injury or boo boo. When I pick her up her legs just kind of flop all over the place and when I hold her feet on my hands sometimes her toes can exert pressure but sometimes they're just floppy. Her wings do flap but it seems like she doesn't have much control over it. At first she had a hard time getting to her food and water because she was so ataxic and her head would just flop around so I helped her a lot. But now she has better control of her head and can eat and drink on her own. Here's a video of me and my dad trying to get her to move around so you could see how it looks. I'm thinking neurological, stroke Maybe?