This hound dog is Jack, a rescue pup owned by Brennan Gilmore, a guitarist with the bluegrass band Walker's Run. Jack often attended rehearsals and sang along with the music, but was not present at live performances until one special night in 2016.
Gilmore tells The Dodo that the band was playing at a theater in Little Washington, Virginia. Jack slept in the greenroom. But the door must have been left ajar when Walker's Run went to the stage to perform an encore because Jack followed them and began to howl.
Sadly, Jack passed on two years ago. But Gilmore thinks of him often, for one of his guitars is engraved with a portrait of Jack.