We do an approximation of the same, macrocosmically, with little to no satisfaction. And they remain in balance with their ecosystem. And as far as we can tell their mind or conscience or consciousness is uncluttered by any of their acts.
(Also: God, "remain in balance with their ecosystem" is such a mendacious phrase. People use it all the time, as if animals have some kind of mystical gaia sense that says, "Woah, woah, woah lion, you're using too many natural resources here. Maybe just meditate today." Here's how lions "remain in balance with their ecosystem": they try to eat everything they can. Sometimes they're unsuccessful and they starve. Sometimes they're successful and cause a local shortage of prey and then they starve. Yaaaaaaaaaaay.)