Twenty four days, or 3 and a half weeks. Pups are starting to spar with each other as they become more aware of their surroundings.  The next box was throughly explored, they have their own potty spot.  New sounds disturb them, they are finding their voices, mostly growls, barking is a little more work.  A couple even have a howl to replace crying.  Still clumsy on their feet, they can creep forward, scoot backwards, spin, and slap paws.  Scratching is a little problematic.  Peeking out over the entry way, there is a world waiting to be explored when they learn to scramble over the barrier.