Here is the scoop: I'm raising 25 Cornish X chickens that I purchased from Welp Hatchery. They sent 27 and 1 died right off. Nothing odd there really, these things happen. 4 weeks later, another one dies. It was always smaller than the rest and never grew feathers. I'm surprised it lived as long as it did. Now I'm down to 25 which is what I paid for. They're 5 and 1/2 weeks old now and have been outside for about a week. Of course now that they are outside, it's rained like crazy every day since they've been out there. I have them in a 10' X 10' pen, half of which is covered, and I move the pen every day. This is the 1st time that I have not used medicated feed. They are now eating a 20% protein broiler grower (Poulin Grain) and for the 1st 3 weeks, they ate a 20% non-medicated broiler starter mash (Morrison's Custom Feed). After the 1st week, I have been feeding them for 12 hours on and 12 hours off. They always have fresh clean water and I have been adding organic, unpastuerized apple cider vinegar to their water since the 1st day at the rate of 1 Tbsp per gallon. I went out to move the pen today and found multiple bloody stools. I checked where the pen was the day before and there were a few there as well. I'm assuming this is Coccidiosis but I'm not positive. I plan to look at the stool under a microscope tomorrow when I get home. I picked up some Amprolium (Corid) from the farm store and want to start them on that. Any thoughts or advice? I've tried to attach a couple pictures of the stool. Sory for the poor quality. I only have a cell phone camera.