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.
On the southern end of the Island, just east of the first artifact cave, there is the small island with the A shaped boulder is. Going north of that, upriver, you will come to an area where the river splits. Sometimes there can be around 3 trotting around on the land splitting the river
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. Vote up to help others!