I have 20 chickens, 1 chick, 5 ducks and 12 ducklings on the property. My 9 older hens (just over a year) and rooster free range and my ducks usually do as well. At this time only my two drakes are out right now with the chickens because my ducks have ducklings that they hatched recently-Ducks and ducklings have access to coop and an enclosed run to keep them safe. I have 1 lonely chick that my ducks hatched for me and I took it into my care as soon as it hatched. She lives in a tote in my bathtub currently, but I take her outside daily to walk around and explore with me. My other 9 chickens are pullets and cockerels around 14 weeks of age and they have their own coop and temporary fenced in area. Two weeks ago I saw blood inside their coop and after checking them all over thoroughly for injuries, I saw one cockerel poop out pure blood. I took a fecal sample to my vet the next day (it was a Sunday when I saw it and collected it). It came back the following day as a moderate coccidiosis infection and I was instructed to treat them with corid as follows: 3/4 teaspoon (corid powder) /gallon of water for five days straight. Vet told me that if they stay in the same run, to follow up with another three days of the same dosage after a month has gone by. She also told me that my other birds did not need to be treated if they didn't have access to the younger birds run because they likely have built an immunity to cocci at this point in their life. It has been one week today since the fifth and final day of corid treatment in this group. Even before treatment, my birds were seemingly happy, healthy and active and did not seem to be ill in any way. I did notice that they were a little skinnier than they probably should be, but not to the point of it being concerning. I am now noticing sneezing, but no nasal discharge. They are eating readily and drinking as normal.They are still active, but don't seem to be gaining weight as I expected them too. I read in another post on here that the dose is supposed to be 2 teaspoons/gallon of water minimum and this alarmed me. That is WAY more than I gave them and I am wondering if I didn't give enough corid in their water? How should I go about cleaning their coop and run thoroughly to prevent reinfection? It is temporary fencing and can be easily moved, but if I do move the fence to a clean patch of grass (there is still grass in their run now) will my other birds be exposed to cocci by walking on and grazing where their old fence was? When should I move the fence during treatment? Should I be treating all birds on the property even if they are not exhibiting signs of illness? Advice is greatly appreciated as this is my first time dealing with this issue and I want to make sure I get rid of it for good!