putting new baby chicks with 1-2 week old chicks?

[superdeluxe]

Did you notice the other chicks pecking the Wyandotte's feet? We just brought home 2 day old chicks (2 of them), and when we introduced them to our 1 week old chicks (4 of them) they went CRAZY pecking at their feet! like to the point where they are picking up their feet with their beaks! We put in a seperator so they can see eachother, but not peck. Any suggestions? They also went CRAZY over them. like all 4 rushing at them.

they didn’t peck the feet, thankfully they settled in, although one of the 9 week old
barnevelders is pecking feathers off the rest of the girls