Smaug's only yawned twice (barring the several times he did it to realign his jaw after feeding), but I thought it was cool/odd, so I was just curious.

It's nice to see that the cat and the snake are cool with each other. I was holding one of my cats when he spotted Smaug moving around in his tank, and I still have scratches on my arm because poor Max jumped out of my arms and hit the floor running.