My pullet I have raised since a chick, died suddenly. We found her laying upside down like she suddenly fell of the roost during the night. We noticed she had also pooped blood that night, which we had never seen before. She has been housed with two other pullets that have seemed fine and healthy. They have been living in the coop in the backyard since about eight weeks old, in the shade under an overhang. I do let them out in the backyard where they eat whatever they can put in their beaks. In the coop, they have been eating organic grower feed, chick grit, flock party snacks, and scratch. I looked up the symptoms of coccidiosis and found that the only symptom she has had is that I noticed her poop was brown and liquidy sometimes. Even when I noticed this poop, I looked it up in the poop chart and figured they were cecal poops. She never had ruffled feathers, seemed to be growing normally, eating and drinking normally, and had plenty of energy to roam around the yard all day like the others. Now I only have the two and I have begun dosing them with Corid in their water in case of coccidiosis infection. I also sanitized and washed out the coop and feeders. I heard that the oocysts can live in soil for two years. These birds have pooped all over the backyard! Will they just keep getting it if this is what the case is?!! I’d also like to be able to replace my girl that died too and not infect a newbie!!! Any suggestions/ideas about what’s going on and what else I should do?