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”.
Tbh I'm on mobile and I have really high level arges(I have 2 arges is what I mean) tho you can try to go to the swamp and kill paracers and you'll earn alot but be on an arge and harvest with the arge trust me you'll earn alot( this is on mobile and not PC alr so if it doesn't work on PC then just know that I was talking about mobile)
For everyone saying the best way to get prime is to kill babies, it’s not the best way is actually to kill an alpha raptor. If you are ready to tame larger carnivores you are probably ready to take one out. They give about 30 stacks of prime, so about 60 in total, wich should be enough to tame pretty much every carnivore. The only thing is that you have to find the alpha first but they are pretty common