Be ready to run into these guys a lot while in the snow biome. Keep your distance if you don't have a decent army built up yet. Lower levels can be downed by some well placed shotgun blasts, just be careful when you engage. If it scares your tames its possible they'll fall right off the icy cliffs into the sea where they'll be devoured by sharks. Its either focus your attention on the yuty and get shredded by the carnos or focus on its carno lackeys and risk all your tames being scared off.
First day it was released, started a new character made a stone house boat and headed north. Was docked, taming a direwolf. Suddenly it drops from a cliff with 3 carnos. They surrounded my boat and wiped me in three minutes. If you see the buff, gtfo.