That idea would actually intrigue me if it felt real. Most juvenile mammals will turn to what is nutrition above all else if left to their own devices. Sorry, maybe I've just had too many protein-obsessed dogs who were formerly eating corn-based kibble and, starving while bloated, decided to demand going outside to eat their own feces at 2am.
In young humans, I've seen otherwise. Don't "poo-poo" me for that, because in courteous advance, it serves no actual perceivable advantage to you, does it.