They grade/sort (out) fleas after they broke their instinctual escapade program, just like industrialized childcare does with humans. That's from a story John T. Gatto once told after he sat next to a tween at an award ceremony, both receiving a price for extraordinary achievements. Sad story, eye-opening conclusion. !invest_vote !COFFEEA

see https://en.wikipedia.org/wiki/Flea_circus