Of course I don't know what is wrong, but I'll tell you the story of one of my hens. She was perfectly fine....Several months old, at least. Suddenly her legs would not hold her up. She seemed healthy otherwise, and I was just beside myself. I immediately jumped on BYC to ask questions, and got replies from several others whose chickens were doing the same thing.
There is a disease called Mareks that will produce these symptoms, so I didn't know if that was to blame. One person on this board (I thought I'd never forget her name but I have!) suggested giving her Vitamin B Complex. It had worked for her chicken. So off to the store I went. Got a bottle of human B Complex capsules. Put the chicken in a cage, and opened capsules and sprinkled that vitamin in and on everything that went into her mouth. Everything. I didn't even pay attention to how much I was giving her, because I don't think too much could hurt her. This went on for about 2 weeks, and suddenly she was starting to stand. So I'd let her out of the cage every day, and watch her. Of course she was a target for the other chickens since she was sort of staggering there for a few days, so I didn't leave her alone. Finally she did start walking again. I was shocked! Now she is huge and has the biggest legs of any of the birds we have. You'd never know anything had been wrong.
And on the lighter side...suddenly she started crowing and liking the girls! That vitamin B is more powerful than I thought! So she went from being called Barbara, to Bob.
I don't know if this would help anything, but it sure won't hurt to try it. Just keep all food and water saturated witn the powder from the capsules. I had mine in a cage big enough to scoot around in, and she could managed to scoot to the food and water. Let us know what happens, please. I'm subscribing to this thread.
Lou Nell