Values above are incorrect, a 140 probably needs about 40kibble. They eat very quickly, are easy to knock out, tame like you would tame anything else with one factor to keep in mind, they are almost always in a pack of 3 so however you would tame a dire wolf, use that same strat.
So super easy way to tame these guys, Hit them once with any kind of fast moving of flying dino and let them use their healing. After the healing aura goes away Ko them. Instatamed since their food meter is fully empty 😁