For low levels all you need is height, 10 tranq darts (get more just incase) 30 narcotics and 20 fish. Shoot it, feed it with narcotics (and fish) until it get to like 94% tame, and you should have a spino. I did exactly that, died once but it got knocked out when I respawned and now I have a level 4 green spino! Goodluck!

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