Since one of the latest updates it is so easy to knock one of these out. Just shoot the thing with a few arrows and it should become uncoscious. After that give it a Bit of raw meat or prime meat and wait. Done.
how to tame annoying ahh carnos that kill most dino’s and you:
1. get bow (level 10) and tranq arrows (level 21)
2. make a trap for it (u can easily find on yt)
3. find carno and shoot tranq arrows while u run to ur trap and trap it
4. shoot tranq arrows until it is unconscious.
5. feed it meat (raw meat, raw mutton, prime meat,etc)
6. boom, u got a carno.
tranq arrows are unlocked at level 21 but need narcotics (level 6) which are craftable at a Mortar and Pestle with Nacroberries (black ones) and Spoiled meat (keep any meat in ur inventory for along time to make it spoil).