This website isn't telling the truth, I tamed a lvl 1 female Rex with some raw meat (5-ish) and about 2-3 raw prime! Only problem with it is that it gets stuck on stuff easily so make sure he doesn't get stuck!! Merry Christmas
This is tge least threatening creature in the game once you hit lv 10. Craft a bow and some arrows, shoot it and kite. If it is gaining on you, run past a herbivore, it will lose aggro almost instantly. Keep shooting that sweet sweet early exp and possibly early metal tools.