DTN reports: Live cattle and hog futures continued their upward trends on Thursday, but feeder cattle struggled to hold onto gains while feed prices were surging. LIVE CATTLE: When cash cattle gain $3.50 to $4.50 over last week ($140 live basis) and outside markets are brimming with optimism, it’s natural for the live cattle futures contracts to trade higher, too, which they did on Thursday. The August contract closed up $1.40 at $140.60, the October contract closed up $0.625 at …