They fight everything they see, even if their Carno friends are not around. If you see a high level Yuty you have to act quick, before it tries to solo a pack of Dire Wolfes or a Rhino couple.

Best way to stop it from starting beef with everything in the area is to use a net gun on it if you got access to it (you can craft it on any map if bought the Genesis Season Pass).

More Yutyrannus Taming & KO Tips