I feed either medicated chick starter, or Flock Raiser, not medicated. Haven't ever had a problem with coccidiosis here, so it's been okay. Medicated chick starter is the safer choice, in case your soil turns out to be heavily infected, something you find out the hard way, with sick chicks. IMO, simple is best. I don't spend time mixing special formulas, adding magical ingredients, or indulging in voodoo (sorry, couldn't resist!) to grow birds. Sick birds may need extra help, but healthy chicks will do great on normal food and clean water. Mary