Originally Posted by
blakefrautschi
you just need to shoot them again if they're still moving, or if their head "pops up" it happens sometimes, it's the most ethical thing to do if they're wounded to finish them off.
but also try something different, if it is really happening that often, no matter who is shooting or what they are shooting there will always be a few cripples. always make sure they are dead before they even get a chance to dive.