Rail capacity and operational issues have been market factors the past 18 months or more, and are increasingly having an impact as evidenced by reports of critically low feed supplies on the West Coast and the Southwest.  Last week a bipartisan group of 51 Members of Congress signed a letter to the Surface Transportation Board (STB) citing:  Feed mills, integrated livestock and poultry operations, and other agricultural operations are also experiencing pervasively poor rail service. This has led to shutdowns and slowdowns at ethanol plants, soybean crushers, flour mills, and livestock and poultry feed mills that are severely challenging agricultural supply chains …  Further, last month Foster Farms, the poultry comp...