Oviraptors can be tamed by using eggs any kind of eggs. Mostly large eggs give out the most effect while taming. Small or medium eggs are good too. But their kibble is easy as long If you have dodo eggs or penguin eggs to make basic kibble to tame the oviraptor. And knock it out with tranq or a club. And have narcotics or narcoberries to help not to wake it up.
These guys are fairly shy, so bring a bola, a bat and a healthy supply of eggs if you want one in your base. I have never successfully tamed one, (which I would love to xD) however my past experience has proven that bolas work on these guys and that once knocked out, they prefer bigger eggs (tame a female Diploducus for best results, but be warned, as you might want to upgrade your inventory a few times before attempting to carry the eggs or tame the Oviraptor while it is near your base. Again, I have never personally tamed one of these, but I know how it goes as I have managed to knock them out before.
I wanna get one of these guys so bad to get a wyvern egg but I abously don’t wanna use giga eggs or questzle eggs. But also don’t wanna use Rex or spino eggs. Don’t wanna tame two brontos just to tame an oviraptor. And it takes to many carno or other eggs. Ugh