How this animation triggers:
A dino has to be at 1/3 of their hp. Once this happens, the usual idle is now the hurt animation, but their attacks will still be visually the same. Examples
-Large Theropods (Tyrannosaurids)
They would look down and breathe heavily.
These will hold their necks down and the body will move down a lot more than usual.
Those are a few examples.
As for flocks, they get a visibly scared animation after only one is still standing. Compies would frantically call and dodos would squak a bit more.
Note: Non-flock creatures, with blood on, would appear bloodied, including during their attack animatios.
And that’s my suggestion of the month. Just sounded cool to me.