Have you ever watched a dog wake out of a dream? She simply wakes up. She can be deep in the throes of a real zinger, yelping under her breath, twitching her paws, and yet when you put a hand on her she calmly opens her eyes and is never surprised to find herself lying on the floor. There isn’t even a split second of confusion in the transition from dream to waking. This is one of my favorite things about dogs.