This is Bozdag. He is a karakachan, or Bulgaria sheep dog, a large livestock protection breed. He has taken it upon himself to escort us, the volunteers, every night to the house we sleep in on the other side of the village. He then sleeps outside our door and escorts us back in the morning.
Besides his penchant for herding, his most notable characteristic is his boundless energy. I do mean boundless. He is ready to play anytime and has a tendency to hop and bound through the snow like an over-sized bunny rabbit.
And this is the theme song that plays constantly in Bozdag's head, which may explain why, as he jumps and bounds and tears at clothing, he is unable to hear the cries of "No, Bozdag! No!"