So I have a pack of high levels and here’s how I did it. Get a pteranadon, pick up the alpha and carry it into a caged in area. The alpha title will go away when it’s separate from the pack. Leave the area for a while and return in a full ghillie suit. This will give the dog time to calm down. Crouch into the area and move very very slowly. Get behind it and pet. It does not matter if there’s a concrete floor. I tamed a level 200 with the floor and everything. Works best during a taming event but will work any time.
Normally you can't tame the pack leader, so just get a pteranodon or argy, pick it up and drop it in a large area (like a separate section of your base). When you take it away from the rest of the pack, it removes its 'pack leader' title, allowing you to tame the highest level hyena of that pack.
Despite it's appearance, the real life hyaenodon was nowhere near related to actual hyenas, but it actually belongs to a group of prehistoric mammals, all extinct, that are believed to be most closely related to pangolins, which aren't related to anteaters or armadillos, for your information.
I used a combat argy to follow them around till they got stuck on something. Tamed a 145 and 150 both times they just walked in place while I sat there and hit E every 30 secs. Don't leave the argy to close or they will continue to try and flee even while stuck.
Build a 1x1 box with door frames and throw a hatch ceiling and 4 more regular walls up and throw it in, it's butt will hang down and you can crouch and pet it under it without spooking it. You CAN tame without alpha present but if it becomes spooked you have to leave your chunk and let it reset.