Fact: Hyaenodons in real life were actually not even related to hyenas , their closest living relatives are pangolins(which also are not related in the slightest to raccoons, anteaters, aardvarks, armadillos or hedgehogs). And real hyenas despite appearances are actually not related to dogs or wolves, in fact their closest relatives are meerkats and mongooses and meerkats and mongooses' closest other relatives are cats and civets(also known as bearcats)
Usage in game:
1) tame aid- can preserve prime meat allowing you to tame carnivores with ease.
2) pack hound- I’d personally only recommend for packs of five and upward, but their ability to heal like Argents means they gain strength with every victory.
3) Pet- Their just cute.