My chicken cannot walk. Does she have Marek's disease?

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Lameness is a very common symptom of Mareks� disease, but there are many other conditions that can also cause paralysis or lameness in your chicken. Nutritional Deficiencies, such as rickets, vitamin E deficiency, and vitamin B1 or B2 deficiencies can cause problems that may mimic some of the symptoms of Marek�s disease. Botulism and certain poultry diseases such as Encephalomyelitis, Aspergillosis, or Lymphoid Leukosis can cause paralysis in chickens. If you have a bird showing symptoms of any illness, quarantine her right away, and have an avian vet diagnose her.