When taming these guys it's not about the size of the animal you feed it. Its about the experience points it gets from killing it. So things like paracers ain't gonna do much cause they don't give much xp. But using wyverns, gigas, spinos, and rexs, will do the trick. But that sounds crazy to use wyverns and gigas but not if you use a baby. The official ark wiki says a 150 will need about 2000 xp to tame.

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