So I found the spino, checked dododex for how many tranqs I needed, and I had the exact amount. Once I built the trap (by gathering the resources from redwoods, since this was at the black sands. Now, once I had used all my tranqs, the spino wasn’t knocked. I then went to get resources for a thatch foundation and a mortar and pestle. Once I got the foundation, the spino was asleep. I put prime meat into it and let it tame. And that’s how I have a spino before a rex.