To tame a spino there are 3 Easy steps

1:get on high cliff with spino at bottom of it make sure it’s high up enough that it can’t hit you trust me based on my experience

2:make sure you halve at least 20 tranq arrows if using bow I suggest a bow the most though

3:get smoothing balm that helps a lot and balm or not use raw prime or normal fish but if you only have fish you should have at least 30 narcotics just in case

4:once tamed treat well always have fish in there inventory and just love you’re spino