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marek's vaccine in older birds

Discussion in 'Emergencies / Diseases / Injuries and Cures' started by yoderfarms, Dec 23, 2015.

  1. yoderfarms

    yoderfarms Out Of The Brooder

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    Jan 16, 2015
    Do anyone know if you can give the Marek's vaccine older birds? I have heard of people giving older birds marek's vac. The bottle says how to vaccine in day old chicks but, I want to see what the oldest age you can give it.
     
  2. ChickenCanoe

    ChickenCanoe Chicken Obsessed

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    St. Louis, MO
    You can vaccinate later but it may have no effect.
    Every day past day old, the vaccine has less effectiveness.
    The reason is that it is in a race with Marek's in the environment. It takes time for antibodies to develop and if exposed to a strain of Marek's they're susceptible to, it won't work.
     

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