A couple weeks ago 2 of my 14 chickens suddenly died (first was 1 year old, second was 6 weeks old). After the second one died, the whole flock was treated with Corid (2TBS liquid solution/gallon water), and there were no additional deaths--everyone appears to be healthy and happy now. I sent the chick that died off for necropsy and just got the preliminary results back this afternoon--intestinal coccidiosis. My question is, what do I do to prevent this same thing again? How do I protect my current flock, and what do I have to consider when bringing new chicks in (which I would like to do). Do I need to do a big coop clean out? Sanitize everything? Remove all the litter in the run and replace? They free range in the yard during the day, so I can't sterilize everything they touch. Are new chicks coming in at greater risk now? Any good info would be greatly appreciated. Thanks!