black_cat
♥♥Lover of Leghorns♥♥
I'm trying to figure this out. Most things say that to prevent disease, you vaccinate the chicks at a day old or at 10 weeks old, but are you still able to vaccinate adult birds? Will it actually harm them? Will the vaccines not work? Please help. I will be getting some adult birds to start out with and want to know what I'm able to safely vaccinate them for, preferably ones that won't stop egg production.
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