The dog metaphor decreased the humanity of the enemies by showing how they were neither noble hunters, nor honorable ones. McKay uses a different kind of tool to show how noble and honorable the speaker and his allies actually are: the analogy. The speaker insists that his allies not die like hogs. That is to say, he prefers that they die like men. You might not know it, but pigs don't usually die in any way that seems noble. It's enough to make you a vegetarian. Also, "hog" is a specific kind of pig. Hogs are castrated, male pigs, and castration is a symbol for powerlessness. The speaker is trying to encourage his allies to manly, noble, and brave in the face of death, and hogs are the opposite in the speaker's eyes.