We've found cocci. in one chicken and remove it, do all 69 others need moved and the coop "sterilized" or just treat them all with the meds and leave in same area? Moving coops and all would be a big job! About 1/2 choose to free range(even with clipped wing) so how do you get meds to them?? What meds do you suggest? Where to get it? and How long to dose?