The spawn on the floating island in the center

They can jump through stone windows. If you have any Windies in your taming pen, close them before you grab these guys.

Hyaenodons are opprotunists, meaning if they have an opprotunity to get a quick, free meal, they'll take it. Corpses? Heck yeah. Low HP? Yup.

I haven’t found a single one in mobile!

Killing gives pretty decent xp since they usually in packs even better