Yes, you could feed the babies organic non-medicated feed. The amprolium listed is a coccidiosis retarder. Cocci is a parasite that lives on the ground of chicken habitation, and other birds presumebly, and resides in the intestines of chickens. Adults tend to develop an immunity to it which starts building when they are chicks and eat off the ground in the run. Chicks raised in cleaner environments may have difficulties when they go outside and become overloaded. Amprolium doesn't even seem to cross the egg barrier because I've heard that you can eat the eggs from chickens being treated for a cocci infection.
Chicks can die from a cocci infection, as a matter of fact, the danger weeks seem to be between 8 and 12, after they're moved from their confined brooder to the outdoors. Amprolium doesn't actually kill all the cocci in a chick's system, it keeps it to managable amounts until they develop an immunity to it.
To get chicks to develop an immunity, they should be raised on a floor with bedding that's not pristine. It obviously shouldn't be dirty, dirty, but they don't need a sterile environment. Wire raised babies tend to have more problems. As they peck around in the litter theoretically they'll develop an immunity to the cocci.
I fed mine medicated feed as babies and had zero mortality out of eleven chicks. Then when they went outside they thrived as well. I can't say whether the amprolium did the job but it's added to chick feed for a purpose. Go to Diseases and Emergencies and read the threads on cocci and then make your decision. You could always switch over to organic after they've gotten through their delicate weeks.
Good luck, Mary
Sorry, I guess I do tend to be long-winded.
