This game has been out for 4 years and you don't know how to tame a parasaur? Well I'm glad you asked newcomer. You first want to create a bola and a club (or a bow with tranquil arrows if you're a higher level) bola the parasaur and beat it with a club til it falls asleep (or shoot it in the head with tranq arrows) once it's out. You can use mejo berries as those are the best berries, or vegetables if you have access to them. Or even kibble if you're that far in. I believe you need simple kibble and there ya have it