What my puppy does when she's tired:
She circles (I don't know how many times), lays down, and eventually rolls over like in this picture. Sometimes she yawns, and it's so adorable because she squeaks when she yawns. Sometimes she dreams. Her paws twitch, and she barks quietly. "Ruh! Ruh! Ruh!" Sometimes she whines in her sleep. This is random. I put it on here because it is very cute.