I guess I've missed something. Unless you're going all organic, I don't know why you're feeding your chicks nonmedicated feed; but I'm sure you have a good reason. Having had coccidiosis in one of my early hatches of keets hatched by hens, I do feed medicated. However, I'm very careful to find it with Amprolium in it. I know they don't need Bacitricin unless they become ill, and Monensin is OK as a coccidiostat for chickens, but not guineas. My guinea keets get nonmedicated game bird starter, but they (as well as most of the chicks) aren't on the ground until they are old enough to not be very susceptible to coccidiosis.