An often-overlooked position at the feedlot are pen riders, though they are essential to any successful feeding operation. Pen riders wear many hats and day-to-day can vary, but their main focus is animal health. A typical day begins around 6:30 a.m. when they saddle horses and start riding through pens. The first thing Bruce Miller, head cowboy at Sellers Feedlot in Lyons, Kan., looks at is their water. “That’s the first thing I do is ride in and make sure they got water,” Miller says.