Mareks or Vitamin B for this paralyzed bird? How Can I tell?

[SarahGfa]

Marek's can go into remission if you give them lots of TLC. My one pullet took a few months to get better. She was in a sling for awhile and I did physical therapy with her every day.

 

[LaFleche]

This five month old Easter egger quite suddenly started walking on her hocks, with her left foot curled under. Overnight. She got around that way for a few days, but then her leg went straight out stiff, and she cannot walk at all. I have separated her from the flock, but now I do not know what to do. The flock has had Purina pellet food, dried worms, scratch and table scraps, but I do not know this one bird's choices. She is not lethargic and has a good appetite.

This presents classically like Marek's disease from what I read, but also like B2 deficiency. Next steps? Some say euthanize. Others work for a cure.

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You already have gotten good advice and I hope your bird responds well. But by the looks of it you might never get any eggs from it as it seems to be a cockerel.

Could you post some more pictures especially of the back/saddle region to clarify?