For several years, beginning in the spring of 1918, a flock of sheep grazed on the White House Lawn. After America entered World War I, the sheep helped to save manpower by keeping the grass trimmed. We don’t exactly who came up with the idea, but Dr. Cary Grayson contacted his horseracing friend Wiliam Woodward about getting some sheep for the president. Woodward sent along a small flock from his farm in Maryland by wagon.