I have a little story. So I'm exploring with my iguanadon and I get swarmed by a pack of Raptors. Of course I left the thing on passive flee so it gets destroyed and I die. I'm like whatever and go get my other iguanadon. It doesn't stand a chance. I'm throughly pissed so just grab my carno (who I dont like, they look dumb as hell) and go to get my stuff. It killed many dilos, chompies, Raptors and a thezanisaurus. The thing is a beast. 10/10 would recommend for protection
Tamed carnos are excellent almost all around: their health, attack speed, and base damage allow you to take on most of the creatures on the island, including Rexes and Alpha Raptors. Having a mated pair greatly strengthens this quality. They run fairly fast and can carry a lot, making great transport mounts. They are a fairly good harvester of meat and prime meat.
Their only real disadvantage is a slow stamina regen, even when stood completely still.
Very useful mid-late game, I have a carno lvl 218 with 4 raptors lvl 180+ and they can escort me anywhere. They kill Rex's like is no big deal. The only thing we can't defeat are titans. The day will come......