I have noticed that he seems very tired today so I think he is having a growth spurt. Most days he spends a good deal of time tearing around my house like a race horse on an invisible track, stopping only to grab some small toy and throw it around.
He likes to tear things up, jump onto surfaces that he is not familiar with and act tough.
When he falls sound asleep he has rough dreams in which he growls and twitches until I soothe him. His eyes move around in his head and he breathes quickly.
He is good for my health.