The–weeks-old puppies in this video are rough-housing with their siblings. It looks like they are exploring what they can do with their body. They are finding that their mouth can be powerful in playing. In fact, more than just playing. They are finding that their body is still quite rounded, and easily turned on to their back by a sibling with just a little push. They are also starting to use their voice to express objections. Or delight.
Enjoy watching these 2-weeks-old starting to rough-house.