Imagine little Milo is a "busy" little one right now. :) Keep shoes, etc. out of his reach. Little ones gnaw a lot!! He'll settle down as he gets older, and need less intensive attention, just like a baby. Tiny pups are much like a newborn, and I've been there 3 times with children and 3 times with small pups. Whew!!
Hang in there, and tell yourself it gets easier with time, 'cuz it DOES!