It is a fundamental Law of Nature that each species has a unique and specific diet for which its physiology and biochemistry is perfectly adapted.

All animals, except the human, eat by instinct; the human, however, to its profound detriment, eats by cultural conditioning, and that is the cause of human disease, including obesity. Neither human ignorance or human arrogance can break or evade this law, or the underlying laws of biochemistry, just as ignorance of the Law of Gravity does NOT allow one to fly.