With his forthcoming album “Sometimes Dogs Bark at Nothing,” he’s back after a fouryear hiatus to remind folks what a lifetime dedicated to country music really looks and sounds like. Sure to please fans of his hardscrabble earlier work, this new release also finds the acclaimed songwriter and vocalist stretching himself musically and personally. In just about every way, Sometimes Dogs Bark at Nothing is a recorded manifestation of Harris’ growth over the last four years. He’s become more comfortable in his singing, more confident in his artistic direction, and more adventurous in his sonic palette. He’s letting listeners in to some of his most difficult struggles and turning a compassionate eye to the struggles of others.