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.
For the mobile....
They're taming effectiveness decreases when you trying to tame same guy after getting dismount or knocked out by this. To make it 100% or maximum you have to unconscious him with trunks... Let him wake up than try it again sure it's 100% or maximum.
It happened with me when I tried to tame lvl 180 with rockarrot no bulm OMG it took me hours. Thank you
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!