I tend to think scenes like this between siblings are played out among humans as well. 😉
These two, rambunctious kits spent an evening a couple weeks ago chasing each other around. It makes for good practice for when they are older and have to hunt on their own. After a while, one definitely got the upper hand, pinning down its sibling.
I imagine at that point the one on bottom went and whined to mom about being picked on. Haha!