I tamed this thing WITHOUT using any traps. It's simple just get about 20 or 10 tranq arrows then shoot it. Always remember to tame a low level. I tamed a level 10 and it was not easy. Make sure you have 20 cooked prime meat. You'll also need 70 narcotic which you can put it in the inventory of the spino then feed him with it. You'll have to wait and keep feeding it just keep it unconcius so the hunger of the spino decreases. Make it to 2135 hunger so you can put your cooked prime meat and tame it. Now you know how to tame it. Be the king of the island!!!