Truthfully, medicated starter has little benefit, especially if you live in a wet warm climate. They can get cocci after they leave the brooder, even on starter with Amprolium. Chicks raised by a broody and on soil from the first week of life rarely ever contract coccidiosis. They peck at mom's poop (she is already immune), which sort of inoculates them against it plus they get small doses from the get-go and develop immunity naturally.
In many areas, like my own, you simply cannot get non-medicated starter, so I'm stuck with it. And before anyone says it, keeping a clean brooder does not stop them from getting cocci.
In many areas, like my own, you simply cannot get non-medicated starter, so I'm stuck with it. And before anyone says it, keeping a clean brooder does not stop them from getting cocci.