I am located in an area where it never gets really cold, but there is constant rainy weather some months of the year. The average daytime temperature is around 70 degrees F. The weather is similar to weather in parts of Oregon. During the last couple of months, I have had a lot of coccidia problems with young chickens, despite medicating their water with amprolium. They have nighttime housing, but their daytime run is not covered and there is mud as well as grass there. I think part of the problem is that I am acquiring incubator-raised chickens at around 8 weeks of age. I also have rabbits (in hutches) and have had no problems healthwise with the rabbits. Looking for any chicken-related advice someone might have. Greenhouse-type covered run to keep them dry? Other ideas?