In order to tame one in a pen you must have a another one of a higher level in separate pen nearby. The pens must be close enough that they'll receive a pack bonus, but too close and the alpha will prevent you from taming the beta.
Never tranq it to calm it. It will continue to sleep for the rest of its life. Mine is sleeping since 56min, and i can't wake up with stimulants cause it's glitched and i can't acces to it's inventory. Happy 150 Hyaenodon tame failled.
They will attack you if they are in large numbers. If they attack, don't flee. Just keep fighting, because when they get to 2 (or 3) they will flee. They are also way to fast to flee form. Just stand and fight. (You're screwed without a mount)
You have to pet it.......but THEY WILL ATTACK IF THEY SEE YOU!
The thing about these is that they don't attack anything unless an animal has really low HP and isn't surround by predators. Stick around a ton of Ankys or something like Ankys, and you should be fine. They are found in Scorched Earth, even though tons of people say they are not there. I found four in an Oasis.
If you're on PvE like myself, you're going to need to first bola the alpha and then gate it in with 4 wooden Dino gateways and their coinciding doors. Just make a square around them. Then, wait for the other hyena's to be a far enough distance from the alpha/cage and then cage them in as well. I did each hyena individually because they spook otherwise.
A word worthy of note, Hyaenodon's WILL attack in large packs. Stick to a group of three, including the alpha.
Also worthy to note that alpha's occasionally enter some sort of rage mode and can quickly break free from bola's.
After you've got your hyena's caged, fly out of render distance to lose aggro and then fly back in and proceed with the tame.
You still need your ghillie suit and to be crouched.
These are only one time uses so make sure to demolish for resources after you're done!
Good luck out there!
Best way I’ve found , bola and tranq then fence foundations around 1x1 with 3 walls and the last use stone fence I was able to pet through the fence FYI once unconscious it will take a while to “pet tame” as it won’t wake so easy take food and water
Easy to find, breed and level. King of Cave Diving. Can use golden hesperornis eggs to quickly level up petting and pack bonus make the tanky with high dps. Can easily reach 4k hp with 500% meelee. Yutyranno buff will make them extremly hard to kill, they heal themselves when eating corpses are small and get armor through their saddle one of the most reliable creatures on the ark.