The attached presentation Use of information to reduce the risk of OPP infection is from Kreg Leymaster of the USDA, Agricultural Research Service, U.S. Meat Animal Research Center of Clay Center Nebraska. It was presented at the USMARC Sheep Educational Program and Sale September 7-8, 2012. Managing OPP, Low Resolution Managing OPP, High Resolution
Looking back on it, it all seems pretty obvious now. Of course the problem in my flock was Ovine Progressive Pneumonia (OPP). I have had sheep with just about all the symptoms, but it took me a few years to notice it and a few more to figure out how to deal with it.