I have a Black Star hen that is approx. 1 yr old that is wobbly and seems very off balance. She has been like this for 3 days now and continues to get worse. Her comb is still bright red and she continues to lay eggs & her poop is normal. I have her in a separate cage away from the other chickens. None of the others seem to be having any problems. After reading several other posts with similar problems, I started giving her Vit B complex yesterday (mixed it in with some scrambled eggs) and she continues to get worse. Now she won't even stand on her own unless you pick her up first and get her steady. I have read up on Marek's, and her symptoms don't seem to fit that either. She is still eating but not as much as normal. Any other suggestions?