In comparison, Chen et al. (2016a,b) infected conventional farrowed, 5-day-old non-suckling (fed with milk replacer and yogurt) piglets with a TC US S INDEL PEDV strain (IL20697/2014) and three other US highly virulent PEDV strains (IN19338/2013 , NC35140/2013 , and NC49469/2013 .