How does Billy react to the fate of Rubin Pritchard in Where the Red Fern Grows?

Even though Rubin was a bully, and a mean kid, Billy is still extremely sad about Rubin's death. Remember, Rubin fell on an axe which stabbed him in the belly while he was out hunting with Billy. Rubin's brother Rainie runs off in shock. Billy is the one who then goes to get real help for Rubin, but it's too late. Later Billy sneaks over to the graveyard and quietly puts flowers on Rubin's grave. Somehow, this makes him feel better, and he feels ready to hunt with his dogs again.