I am sure Goku has in him a share of that, he had his "moments" when he was here with me, twice at night while the other pups were playing, he was somewhat more alert and came towards the fence barking with low pitch voice and tail up. I wish I kept quiet and just enjoy the sight, but as I praised him saying "bravo" he was distracted actually, and came to me in a play mood, his body language switched from "defense" to "play" in an instant - my mistake, I should have kept quiet. Late Dino was more relaxed, not as alert, but he was bossing everyone else around. I am looking forward to seeing the first videos of Goku in protection work.