We just got 2 new chicks for the first time in April, around Easter. They're about 2 months now. Yesterday we brought 2 new pullets home that were slightly bigger. The New Two ( as they are called
) pick on our old ones. Why do they do it?
I know it's to establish the pecking order, but the smallest of the old ones is taking all of it.
What to do?!?

I know it's to establish the pecking order, but the smallest of the old ones is taking all of it.
What to do?!?