Ralph is symbolic of our physical selves, and his reaction to actually hunting is, not surprisingly, physical. He has gotten a taste, so to speak, of the adrenalin which is present at such moments. In fact, Ralph gets excited enough to almost join the hunting frenzy--almost. This is a foreshadowing of a time when he actually will join the frenzy of the hunt and kill Simon.
Ralph's participating in the hunt in Chapter 7 leads to his becoming excited over having hit the pig in the snout. He even participates in the pretend hunting of a pig as Robert crawls around on his hands and kneesa;
Ralph too was fighting to get near, to get a handful of that brown, vulnerable flesh. The desire to squeeze and hurt was overmastering.
When Jack comments that hurting Robert was a good game, Ralph replies "uneasily" that it was "just a game." He is ashamed at how easily he has regressed to being a savage himself. Quickly, he shakes himself out of his new mental state, returning to his role of leader, urging the boys to rebuild the fire.