I got the Marek's vaccination for my chickens, but one chicken seems sick! Is the vaccination not working?

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If your chicken received the Marek's vaccination, she will most likely be protected from the symptoms of Marek's disease, but a small percentage of birds will still get sick with Marek�s, even when vaccinated. Also, there are many other illnesses chickens can get. For instance, if you got a whooping cough vaccination as a kid, you can still get the flu, or liver disease, or bronchitis, or an ear infection, or lyme disease and so on. The same goes for your chicken. Vaccinating for Marek�s disease will not protect your chicken from all sicknesses, only Marek's.

As always, if you think your chicken is sick, you will want to contact a veterinarian to get a firm diagnosis and treatment options.