Its easy to tame these guys, this is what i do when taminf a low level to an average level: (works in all devices)

1. Find high ground and start shooting at it (30 tranq arrows maybe, and if no high ground then build a few stone pillars and ladders on it then start shooting)

2. It will run away when its torpidity is high, get down and chase after it and keep shootin (their pretty fast)

3. Once its knocked out, feed it raw fish or any other food that does better effects

4. Add about 60+ narcotics since their torpidity drops fast

5. Enjoy your new spino (they take about 30+ minutes to tame for a low level)