Prior to virtual fencing, Finley and her father could gather about 85% to 90% of the herd in a week. Since using virtual fencing, Finley said one of their most recent roundups lasted three days, and they located every single cow. The other major concern for ranchers is the cost for a virtual fencing system. Virtual fencing helps control invasive grasses, installing fuel breaksWhile virtual fencing is designed to contain livestock without physical fencing, it is not intended to outright replace secure perimeter fencing. Using virtual fencing, 25 cattle were successfully concentrated on a field of Medusahead (Elymus caput-medusae), an invasive annual grass.