Do all snakes shed their skin?

Yes they do !

A snakes skin, while flexible, doesn't expand as they grow like ours does. Periodically, they have to shed the old skin in order to grow. They also shed to aid in repairing wounds to their skin too.

Young snakes shed more often (sometimes every two months) than older snakes because most of their growing is done while they're young - just as we do. Therefore they need to shed more often. An adult snake of five years or so - may only shed once a year (or even less !)

My oldest Royal Pythons only shed roughly every 16 months - yet their babies shed every seven to eight weeks !