"Git Along, Little Dogies" is a traditional cowboy ballad, also performed under the title "Whoopie Ti Yi Yo." It is believed to be a variation of a traditional Irish ballad about an old man rocking a cradle. The cowboy adaptation is first mentioned in the 1893 journal of Owen Wister, author of The Virginian. Through Wister's influence, the melody and lyrics were first published in 1910 in John Lomax's Cowboy Songs and Other Frontier Ballads. My fave version of this song is, of course, by Roy Rog