The owners of this Central California dairy insisted that a shield be placed in front of the cows standing on the platform of the rotary parlor. They believe it helps ensure smooth loading of cows onto the rotary because it gives the cows a defined space. Before the shield was installed, the cows hesitated for a moment, as they tried to gauge the open space in front of them, before entering. The shield, made of galvanized steel on the bottom and polyurethane on the top, cost about $6,000. David Reid, director of milk harvest science and technology for Bou-Matic, says he agrees that cows seem to enter better with a shield in front of the stalls.