Buck was slowly turning into a wild dog. He learned about how his ancestors had lived in the wild and how new dogs like him had forgotten the law of the wild. Now that Buck was changing, he felt like he had become something more than a domestic dog. Instead of sleeping in the sunshine, Buck howled to the moon. Instead of being taken on walks, he hauled others around on a sled. Buck became more wolf-like and felt like he had found a truer part of himself. In the last chapter, Buck had learned not to pick fights or to take part in them. But Spitz, his new enemy, was always trying to pick fights with him. Avoiding the temptation to attack was killing him inside, but he knew better. If Buck fought Spitz, he could very likely be killed, just like Curly on her first day...