Mean chick bullying others. What do I do?

[Ashspd50]

I have a chick which I was told was an araucaa, however I am not sure that is true and am too novice to know for sure. This chick is less than a week old and is such a bully! It picks on the other 8 chicks with it including chicks that are over 2 weeks old. It chases other chicks and nips at them and rips their feathers out. It is now seperated from the others, but I'm not sure what to do with it. Can I deter the behavior or is it a lost cause?

 

[lightchick]

He's probably will become less aggressive if you keep him separated for awhile.