Giving 4 week old chicks to broody hen

[BettyH]

My question is similar, but with a twist. I have 2 broody hens. Do you think they will be ok in a pen which is separate from the rest of the flock, but has 2 other hens which have 4 week old chicks? These 2 are getting alone well. But wondered if the sitting ones would get too anxious.