If you are aiming to tame one, you can find a Cerato with a baby, kill it, imprint on the baby, and done. HOWEVER, if you don’t want to, and want to tame one normally, you first have to make a hemogobin cocktail, apply it to your creature that is preferably a tank with over 5000 HP depending on the level, and let the Cerato hit your creature while the effect is going. The Ceratosaurus will become “drunk” and passive, allowing you to hand feed it just like you would with a Moschops, but it’s preferred food is extraordinary kibble or raw mutton or raw prime meat.