NCBA: Merck's Vence offers virtual fencing at your fingertips Virtual fencing brings together profit, sustainability and real-time information about your herd — all for considerably less time, effort and money than traditional fencing requiresGary Tiller, commercial director of Vence, a subsidiary of Merck Animal Health also known as MSD Animal Health in other parts of the world, spoke to The Cattle Site’s Sarah Mikesell in San Antonio, Texas at the National Cattlemen's Beef Association’s CattleCon about virtual fencing for rotational grazing and cattle management. Vence is a virtual fencing livestock management system for cattle which controls cattle movement, manages grazing, creates virtual fences to dictate grazing behavior and monitors animal location and movement. If you think about virtual fencing at its very base, think about the invisible fence for your dog. There are multiple value propositions for virtual fencing. We have millions and millions of human pharmaceutical customers, and we treat your data on the virtual fencing side the same way we would treat it as if it were your medical information.