So we have 5 one year old chickens and are getting 3 new chicks this week. Last time around we did non-medicated chick starter. After the fact I had read in the book I had that medicated feed was the recommendation to allow the chicks to build up immunity and exposure to coccidiosis in the soil. I feed my current chickens organic layer pellets. When I went today to pick up medicated chick starter the feed store told me the chicks are vaccinated against Marek's and come form a coccidia free hatchery and it is unnecessary to use medicated feed and that will mess with their gut flora. So the opinions I'm getting are conflicting. What have you guys done? I think I was under the impression that my newer chickens will be more susceptible to coccidia when we integrate them, which I'm not planning to do until 12 weeks when they are big enough to be around bigger birds. Looking for your recommendations.