Here's how to tame a hyaenodon:

1. They are passive tames, which means you don't need to knock them out to tame them.

2. Walk up to one slowly from the back, but don't get too close. And then pet it. Wearing ghillie armor can reduce the chances of the hyaenodon spotting you.

3. Keep petting it until it's tamed.

I hope this helped! Bye!

-Pablo27