Once it is KO’d, build spike walls around it so that things like raptors and compys can’t eat it, as they have extremely low health after being knocked out. Keep in mind this will not always work, because some creatures, such as troodons can leap, meaning you should still keep an eye on it. I learned that the hard way. A got rid of the troodon with on 8.1 health left on my tapejara. I did manage to get him tamed up though!