Hi. I'm getting my first batch of chicks in a little over a week. I have a question about vaccines, medicated food and such. Just read that feeding medicated feed will negate the coccidia (I'm not sure if I'm spelling this right...I've seen many variations). Anyway, I did order my chicks vaccinated for Marek's...is this the vaccine that would be negated by medicated feed? I'm confused...c'mon experts, please straighten me out!