Kinda funny but Aldoron made a very good point there. It's no different than human eating animals. He's a dragon god so he's consuming large amount of nutrients, like a panda eating 12kg of bamboo per day to get the nutrients needed. Is that too much? No, it's essential for their survival. Who are you to dictate it's wrong? Because they are humans? But to a Dragon God, human are mere livestock for consumption, like animals livestock are to humans.