Off balance

[Groucho]

I have 6buff orpingtons that are 9 months old, this afternoon when I let them out I noticed one seemed off balance. It was like a person with inner ear problems. Poop seems fine and all else looks fine on her. She can,t run with out losing her balance. Any Ideas on what it might be? Thanks.

 

[Eggcessive]

Does she seem okay otherwise, or are there other symptoms? It sounds like a neurological problem such as Mareks disease, or more rarely botulism. or spirochetosis. Did she have a Mareks vaccine? Here is some info about it, although I hope that is not the cause:
http://extension.unh.edu/resources/files/Resource000791_Rep813.pdf
http://partnersah.vet.cornell.edu/avian-atlas/search/disease/502