These guys are easy to tame low level but a 150! The tame percentage drops as the horse runs do good luck ever taming a high level one. Unless! You knock it out build a box around it wait for it to wake up and the tame to your hearts content.
This stinking thing!!! So annoying!!! I was taming it on a cliff and I was a bit slow and it knocked me off. RIGHT INTO A SWAMP. I swear, while everything was eating me, sarcophagus, titanoboa and mega parana, I saw it laughing at me.
You can feed it then use a bola (which doesn’t lower effectiveness) and after that use fence foundations and walls to keep it in place and ride it for the duration of the tame. No need for it to run around randomly.