I have a few questions regarding coccidia in chickens. I'm new with the chickens. I have 2 big coops/runs, 1 small coop/run and 2 nice size cages that are off the ground. I recently hatched some chicks and had no problems all healthy and my large fowl all healthy. I did give ivermectin to large birds outside for 2 days in water. I didn't feed the medicated feed to my chicks and had no problems and really would like not to feed medicated to them if possible. My first hatch were huge chicks and were out in a big cage outside at 4 weeks with heat lamp at night. I live in Florida and is very hot and humid. I had hatched my second group and all were doing good. I came across what I thought was a good deal and bought some chicks that I thought would be great since they were the same age as the ones I had just hatched and they had some the same age as my first group I hatched also I bought a young rooster, which was what I was actually looking for and just thought I would pick up some of the other chicks to make my trip worth it. Like a dummy, honestly thinking these were clean birds from a clean place, came home and put them all with the age groups they needed to be with. Make a long story short, I lost some of my babies, 1 from the 4/6 week group and had one of my older hens act lethargic just for a day but started corid treatment and she was fine. I hatch my chicks and put them in a tote with heat lamps and keep very clean but had been using shavings which I think I will change with the next hatch since they get shavings all in the water and then create moisture which I know isn't good. I know I can bleach my totes for future hatches so I should be ok there. As long as I bleach the 2 bigger outside cages is there any reason I should have to feed medicated feed or cause new chicks to get coccidia?? What is the best situation for any new large birds that I get for any of my big runs?? I know the deal with quarantine but if my place now is going to be what I have to worry about making them sick how do you fix this?? I don't want to have to give corid to my big chickens every time I get someone new, kinda defeats the purpose in getting eggs if I'm throwing them away all the time. What do most people do? Is this normally not a problem for older chickens and just maybe because of are bad rainy weather that week could be why my hen was affected? My coop in that group is wood so I know it will be hard to completely disinfect it but will be doing a big cleaning and then I'm thinking of putting some sweet pdz and maybe a little DE down? Any suggestions? My other large run never had any new birds added and all were good but treated anyways. My small coop/run is new and just started putting my 7/8 week olds in it but feel it should be ok since they are on day 5/5 being treated. My plan is to sell the roos and keep the girls and when they are old enough introduce them into big flock and then have that coop/run for the next group. I guess I'm just trying to figure out a plan if there is one, so all are healthy and try not to keep having problems. Do you think I should feed my chicks medicated food since I have had coccidia or is cleaning and disinfecting good enough? I definatly won't add anything to my chicks. If I get any that I don't hatch they will just stay in there own group till older. Also had a question on the eggs after treating, can you hatch from eggs that treated hens lay or is it best to just throw away? Thank you for any input!!!