A fleet of semi-trucks with cattle trailers rolled into Great Bend Wednesday, their destination was the Hiss Dairy. After nearly a century, the dairy has milked its last cow, a victim of time and a rapidly changing production ag economy. The long-time family dairy operation on the west edge of town is selling its herd of over 500 cows to a start-up dairy in southwest Kansas, and the trucks came to haul the animals away.