Elm Farm Ollie (known locally as "Nellie Jay") was the first cow to fly in an airplane, on 18 February, 1930. On the same trip she also became the first cow milked in flight. This occured for scientists to observe midair effects on animals, among other reasons.

Not satisfied with these feats, the people who milked her put the milk into paper cartons and parachuted them to fans waiting below.