where did the song mares eat oats come from
Mairzy Doats Milton Drake, one of the writers, said the song had been based on an English nursery rhyme. According to this story, Drake's four-year-old daughter came home singing, "Cowzy tweet and sowzy tweet and liddle sharksy doisters."[4] (Cows eat wheat and sows eat wheat and little sharks eat oysters.)
Londonderry Air Ross submitted the tune to music collector George Petrie, and it was then published by the Society for the Preservation and Publication of the Melodies of Ireland in the 1855 book The Ancient Music of Ireland, which Petrie edited.[1] The tune was listed as an anonymous air, with a note attributing its collection to Jane Ross of Limavady.