CAILLOU IS BALD BECAUSE HE WAS A BABY OF NINE MONTHS OLD. WHEN IT WAS TIME FOR HIM TO GET OLDER, THE ADDITION OF HAIR MADE HIM UNRECOGNIZABLE SO THEY DECIDED THAT CAILLOU WOULD NEVER HAVE ANY HAIR AND THAT SPAWNED T ON TO HAVE LOTS OF THEORIES ON WHY HE WAS BALD!