How to tame basically any carnivore with raw prime meat:
Get some female rexes and a male rex. Get them to lay fertilised eggs. Incubate the eggs until they are a few seconds from hatching and pick them up. Knock out what you want to tame and starve it for the amount of time indicated on Dododex (note: if you’re taming royal griffins on mobile, you’ll need to starve it for ~60% more time than what Dododex says). Then, put down a bunch of standing torches, light them, throw down your eggs, and hatch the baby Rexes. Kill the babies and harvest their bodies with a good carnivore or good pickaxe. Finally, transfer all the raw prime meat to the knocked out dino’s inventory and it should instantly tame. The nice thing about this is that your new carnivorous friend was sleeping so it won’t know that you just murdered some babies and won’t think you’re a monster, and the female Rexes won’t see you killing their children, so you can just tell them their children died of “natural causes”.
How to get a shitload of prime: Use a flyer (preferably an argent) and pick up an ant. Then drop the ant next to a megatherium. It will go on a killing spree but never harvest the bodies. Once it has finished, go down an collect your prizes. This works best near the redwoods as the most creatures live there that will drop prime.
People need to talk about mobile more.I’m on mobile and what I find best is to tame two turtles and go after some arges.But you can build some spike walls( wood or metal) and lead some “NON AGGRESSIVE” massive claw butchering Dino to them and wait until dead to harvest. (If u do this make sure to have a bed to respond in)