Being new to the world of fowl I have many questions. It seems like most starter feeds contain some type of antibiotic. The Nutrena for my chicks contains amprolium and the gamebird starter for my guineas contains bacitracin. I understand that birds can get coccidiosis. But do you have to use antibiotics as a rule? And should you change to a abx-free ration before processing and if so for how long? I've heard some say to leave them on the starter and don't change. But I wonder if I am going to be ingesting this medicine along with my meat, which I don't want to do. I already changed to a nonmedicated ration for my chickens. How long does it take the birds to clear the medications?