The pups are now rehearsing scenes from "Jurrasic Park"

[KurtNYC]

They sit face to face on the floor and make these Wookie noises at each other while baring their teeth. The noises aren't growls or cries or barking; more like "aaaaaaarnk" . They combine that with leaning in and going for a nip on the other. Then they do these crocodile jaw snaps and all you hear is the teeth coming together.

They do this other thing where they stare at each other 5 feet apart and then bow and pounce. Ocassionally they both go up at the same time and meet in this vertical position, chest to chest. It looks like Sumo.