Hyenas are interesting in that they are genetically more closely related to felines, but behaviorally more like canines. Similar to canines, they are non-arboreal (don’t climb trees) and they hunt by running to catch prey with their teeth rather than their claws. There are other similarities in behavior as well, but ultimately hyenas are neither cats nor dogs but rather their own unique family in the order carnivora. But when they roll around on the ground like this girl was doing in the Masai Mara of Kenya, they certainly look like a few dogs — and cats — that I’ve known in my day.
Nikon D300 with Nikkor 200-400mm lens (at 360mm) ISO 800, f/5.6 at 1/1000th of a second