I was pretty good with chickens, but around 3 years ago I stopped raising chickens and I've been chickenless since then lol Well my question is...are there like drops that you put in their water, or in the food, or an alternative to vaccinate them? My uncle's hen just had chicks and he's wondering what he can do to prevent Marek's disease. And if there's only vaccinations, where can we buy them? Thanks 
