Being new to chickens I have one thing I just can't quite understand yet and that is about cocci and the developed imunity. You see, I know that it is recommended to feed them medicated feed for a period if time to help prevent it, but does that interfere with them building up their systems against it? Another thing I'm lost about is if I am feeding the medicated feed what happens when they go outside to the grass and are exposed to it (maybe) shouldn't they always be on medicated feed? Maybe I'm slow, but I am really lost. Can someone please clarify?