Well, technically speaking while the Legiana certainly is much more majestic and pretty-looking than the Odogaron, the big red doggo IS thougher than the Legiana both by game and logically. Flying animals, unlike terrestrial creatures, have hollow bones to make them lightweight and allow ease of flight. This also means they're much weaker to blunt force trauma than their land-dwelling brethen. For example, you could toss a stone at a dog's head and you would hurt it badly, maybe even kill it from internal hemorrage if hit hard enough. But if you do the same to an eagle and happen to hit it in the head, the bird's skull will turn into a bloody mush and it will be dead before it even hits the ground.