The Greek god Apollo is the most rational, artistic and fastidious of the Olympians. So why is an animal noted for its ravening nature part of his cult?

The Greek god Apollo is the most rational, artistic and fastidious of the Olympians. So why is an animal noted for its ravening nature part of his cult?
Hyperborea, and the Hyperboreans, seem to have had an enduring life among the ancient Greeks and Romans, even if they couldn’t always agree on where it was. It first intrigued me because of the story that Apollo went there every winter.
Asteria is another Greek star-goddess, but of a rather different type. She was associated with oracles of darkness, such as prophetic dreams, astrology, falling stars, and necromancy. (Her daughter Hecate, the witch’s goddess, would follow in her footsteps.) She was sometimes blended with the night-goddess Nyx, an alternate mother for Hecate.