Here is an easy way to tame raptors:

1) Craft a bow

2) Craft a mortar & pestle & craft tranq arrows with narcotics

3) Craft multiple bolas (4-5 just to be safe)

4) Go near forests or an open, grassy biome and search for a raptor

5) Walk up to it, wait for it to come at you, and bola it when it gets in range (run away or kill it if it's level doesn't meet your expectations)

6) Shoot it every 5 seconds so that it doesn't take too much DMG and it's torpor can rise properly (kill it or run away if you don't like it's stats

6) Feed it raw meat (you can use prime meat, mutton, or kibble) and keep on you narcotics just in case

7) Have fun with your raptor ;p