Taming these things are really amazing. At level 40 I Tamed my first rex. An albino male. He was so powerful and amazing that i felt like I was a God. After leaving up like crazy, I found a pitch black female rex. She was a lower level, so taking her down was easy. After Taming and leveling her up. I brought her back to my base and introduced he to my male. Together they will be king and queen of the island. And I'm hoping that there eggs will hatch soon.