BERKELEY, Calif. - A protest at Golden Gate Fields in Berkeley led by animal rights activists has forced the cancellation of hundreds of COVID vaccine appointments, officials with the racetrack said.About two dozen people from the organization Direct Action Everywhere (DxE) gathered at the racing facility Thursday at around noon to protest the alleged abuse of animals at the racetrack, the Berkeley Police Department told KTVU.Four of the activists, all of whom are Bay Area residents, lay on the racetrack, connected by PVC pipes in a move the activists called a sleeping dragon.