A dog in Connecticut has truly proven he's 'man's best friend'. This mixed breed is Duke and his owners say he helped save their baby's life. Duke jumped into their bed Sunday night making a commotion and waking them up. That's unusual for Duke so his owners got up to investigate what was going on. They found their daughter in her nursery not breathing and called 911. Paramedics were able to revive the baby and she's doing fine.