Three Dog Night signed contract autographed by Danny Hutton, Michael Allsup, Jimmy Greenspoon, Joe Schermie, Cory Wells, Floyd Sneed, and Chuck Negron. 9x12 inches Three Dog Night is an American rock band formed in 1967, with founding members consisting of vocalists Danny Hutton, Cory Wells, and Chuck Negron. This lineup was soon augmented by Jimmy Greenspoon, Joe Schermie, Michael Allsup, and Floyd Sneed.