Close in under the sheltering rock Buck made his nest. So snug and warm was it, that he was loath to leave it when Francois distributed the fish which he had first thawed over the fire. But when Buck finished his ration and returned, he found his nest occupied. A warning snarl told him that the trespasser was Spitz. Till now Buck had avoided trouble with his enemy, but this was too much. The beast in him roared. He sprang upon Spitz with a fury which surprised them both, and Spitz particularly, for his whole experience with Buck had gone to teach him that his rival was an unusually timid dog, who managed to hold his own only because of his great weight and size. 
Francois was surprised, too, when they shot out in a tangle from the disrupted nest and he divined the cause of the trouble. "A-a- ah!" he cried to Buck. "Gif it to heem, by Gar! Gif it to heem, the dirty t'eef!" 
Spitz was equally willing. He was crying with sheer rage and eagerness as he circled back and forth for a chance to spring in. Buck was no less eager, and no less cautious, as he likewise circled back and forth for the advantage. But it was then that the unexpected happened, the thing which projected their struggle for supremacy far into the future, past many a weary mile of trail and toil. 
An oath from Perrault, the resounding impact of a club upon a bony frame, and a shrill yelp of pain, heralded the breaking forth of pandemonium. The camp was suddenly discovered to be alive with skulking furry forms, - starving huskies, four or five score of them, who had scented the camp from some Indian village. They had crept in while Buck and Spitz were fighting, and when the two men sprang among them with stout clubs they showed their teeth and fought back. They were crazed by the smell of the food. Perrault found one with head buried in the grub-box. His club landed heavily on the gaunt ribs, and the grub-box was capsized on the ground. On the instant a score of the famished brutes were scrambling for the bread and bacon. The clubs fell upon them unheeded. They yelped and howled under the rain of blows, but struggled none the less madly till the last crumb had been devoured. 