Taming a spino is a kinda hard. I managed to take one though. You'll need prime meat, fish meat, mutton, or just meat. I'm using prime meat and fish meat. Then you'll need tons of narcotics. Depends on the level. I prefer you to use a longneck rifle with tranquilizer darts. They run away fast so you will need to ride a fast runner and chase after the spino. They can spawn in the RedWoods. I hope that was helpful!

-TaffyMilky