For players that doesn’t have tranq darts and turtle kibble.

1. Plant Rockcarrots in medium crop plot, grow it till you have about 150

2. Find a Bronto close to a big cliff.

3. Use crossbow or normal bow with tranq arrows to knock it.

4. Once it is down leave it so the Torpor almost runs out.

5. Feed it a bunch of narcotics and put 150 carrots in, it will take less than 2 mins to tame.

I tamed a lvl 20 bronto with this method.