Chicken age and vaccination

Question

Can anyone tell me when chickens/chooks can be vaccinated? If laying pullets is it too late? And what old for chickens? Is 10-14 wk too late? I heard that the vaccination can have negative side effects such as growth retardation? Thanks

Nabil · Accepted Answer

Hello emma 
It depends . 
Some diseases are age related like gumboro . It hits the layers from 4 to 7 werks of age so, we need to vaccinate ir earlier .
 Other like EDS ( EGG DROP SYNDROM) hits the birds during production only so it better to vaccinate it before the onset of production .

Some killed vaccines needs priming .

Chicken age and vaccination

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