They are awesome tames, with some exceptions.

How to tame:

1. Find one, preferably alone if you're a starter

2. Equip wooden club (craft if needed)

3. Fight it with wooden club until unconscious

4. Put some meat in their inventory and some narcoberries (keep some meat to the side in case the meat in dilo inventory isn’t enough)

5. Wait for it to be tame and customize it

6. Enjoy your starter killing machine