Top Dutch dressage rider Anky van Grunsven has canceled plans to compete in this weekend’s Signal Iduna Cup in Germany and has put a lock down on her stables. She reported the information on her website and said it was due to the presence of Rhinovirus in her stable. Van Grunsven said it means no horses are leaving and none are coming in. Her’s is not the only stable taking this action. The stable of fellow Dutch rider Sander Marijnissen is also closed.