The boar-hunting thing ties into much of the Boxer's structure and appearance, too. For example, the undershot bite allowed the dog to get a better, non-shakeable grip on the prey; the foreshortened muzzle and up-turned nose allowed the dog to breathe while it had a mouthful of skin and fur; the 'furrows' just in front of the eyes funnelled the blood away from the eyes so the dog could still see while it was holding its prey.