Make a taming pen on a raft the shoot with tranqs, slingshot or a club. After go get some majo Barrie’s or carrots. Let the tame stay unconscious for about 20 to 25 min then give it Barrie’s. Make sure to keep the tame unconscious with narcobarries or narcotics. This really works because I tried it and it work like a charm
They are not very difficult to tame, just bola, shot it with tranks, trank arrows, or just hit it in the face with a wooden club until it gets knocked out. Then just feed it berries, and wait until it tames.
Congrats, now you have a creature that has infinite stamina, collects tons of berries, and it is a seed-making machine.