I have four dogs. The mom, the dad, and two of their sons. The dad bullies one of the sons by charging at him, growling and putting his teeth on his face - usually to the point of causing him to bleed, and now he has scars all over his face. How the fuck can I get it to stop? Countless times I've yelled "no" and grabbed the dad by the scruff and pinned him down. He also tries to steal his son's food if I'm not standing there watching.