There are two groups that have the name "Hair of the Dog" 1) A Irish Folk Band 2) A now defunct Hard Rock Band 1) Hair Of The Dog formed in 1992, bringing together six of the most talented musicians from the upstate New York acoustic music scene. Since then, Hair Of The Dog has entertained thousands of fans of all ages with their unique blend of Celtic, rock, folk and bluegrass music. Their high energy sound, smooth four-part harmonies and tight instrumental attack has made them America's number one Irish folk band