He is an Australian shepherd dog who navigates the world with fearless joy. When I had two heart attacks, his unwavering devotion helped save me He is an Australian shepherd dog who navigates the world with fearless joy. When I had two heart attacks, his unwavering devotion helped save me Luke, a blind Australian shepherd, came to us seven years ago, after we rescued him from a working horse farm. Even though he can’t see, Luke moves around with a fearlessness that is inspiring. He compensates