“Absently Ed’s hand strayed to the head of the dog beside him. “Gold fever,” he grinned. ‘We're due for another epidemic.” ‘The massive dog pushed Ed’s knee with his muzzle as if he, whose ancestors had drawn the sleds of more than one gold-maddened horde, understood the vainness of the quest.” DogsGold Rush Book:Derry’s Partner Source: Derry’s Partner