I have a calf that is about 6 months old that is just not gaining weight. He is the runt of the herd so I give him special attention. I grain him most every day vs 1-2 times for the entire herd. I have wormed him twice plus given him Probias. He got pinkeye in the summer and I treated that but still no weight. I read in AAA journal an article this month about Johnne's disease but it only mentioned the effects not how to detect or cure. I searched the web w/ no success. Anyone with suggetions?