This is a photo of my Bouvier , Bones, herding cattle through a set of panels (equivalent to an open gate, but without fence on either side) in the middle of a field. To control cattle out in the middle of a field , away from a fence, takes much grater control by the dog. Cattle like to move along fence lines, following them naturally. Away from a guiding fence, the dog has to supply all the direction. Sets of panels such as these are a common trial obstacle to demonstrate the dog's precise control over the movement of the livestock, who could easily divert off to either side. Notice that the heads of the cattle are low and their necks and tails relaxed. This is how calmly cattle should be moved if you want to maintain weight and mild production. this is an exemplary performance. Notice also that the dog is very low keyed in his demeanor.