How to deal with pycno pack

They everywhere, got killed by 2 different pycno pack in 1 hour, with all my cells i hate pycnos, they the reason i got muted for 1 week, how can i be pycno killer, i want to kill them and I won't even eat their stinky flesh, I'll just butcher them to pieces, i bought all the dinos yesterday, so i can play any dino you recommend, who's the ultimate pycno killer.