No. We do not put medication in our Little Pecks chick starter grower feed. Medicated chick feeds contain amprolium, which can help a chick build immunity to coccidiosis. However, it also works as a Vitamin D/thiamine blocker and can cause thiamine deficiencies. Ducklings are more prone to and at risk for thiamine deficiencies, so always opt for a non-medicated feed for a mixed flock with ducklings, ducks, and waterfowl.