Some baby corns eat like Cal. kings. Most can find the nose of the pinkie, fuzzy, or hopper and decide to eat from there.
Thank the lord you don't work with hognosed. They start eating where they bite it, even when that bite is square in the middle, even when they first hatch, and the pinkie is 1/2 their weight. More meals than not are struggles -when they shouldn't be. Butt munching is a reality, we need to lighten up. And let the kids do their thing.