With the Dragons causing intolerable friction with the Berkians with their instinctual habits, Hiccup must enable a reasonable co-habitation.
Did You Know?
When Snotlout throws Hookfang the bread his neck spike are there, but in the next shot they're gone. Then his neck spikes are back when the camera shows him after Hiccup gives the others bread for the training. Then later when the riders catch their dragons eating the food Hookfang is missing his neck spikes yet again. See more