My chicks are a week old and doing great. I got 22 assorted breeds from Meyer hatchery and have not lost one. Other than 3 cases of pasty butt the first day, they all seem to be thriving and growing. I am feeding the Dumor 20% chick starter from TSC. I assumed all chick starter other than organic would be medicated but after doing some reading and checking the bag I have, I realize that is not the case. My chicks will eventually be free ranging in our yard and our sheep pastures. I know coccidiosis can be a big problem and want to prevent it if possible. Should I switch to the medicated feed if I can find it? Is it too late to switch? If I do make a change should it be gradual? Should I leave well enough alone and keep feeding the non-medicated feed? Help! I am not so concerned for the chance of coccidiosis now as I am worried about it when they are exposed to the yard and sheep pastures.