Tbh all you need to do is mine stone alittle metal and some wood and drop it and it will start to tame, if ur by resources then it will help to. If you have a flying mount of any kind then that will help too, fly into a grove of trees and knock it out then just collect wood and give it to it.
Very easy to raise, just drop tons of stone infront of the baby. It will keep picking up stones no matter what it's weight cap is.you can fill unlimited stones like this and will never have to hand feed.
I took my argentavis and a doedicurus. Gathered as much stone as the doedi could handle (a few thousand), then dropped stacks of stone (from my inventory) a few at a time (short spoil time, be aware). A level 145 only took a few minutes this way.