I would move them if the other hens remain aggressive.
While many on this list have no issues with communal brooding, it is very dependent on the momma hen, her pecking order, and general make up of the flock and the yard area.
I have had bottom of pecking order hens unable to protect their chicks, so if in doubt, I keep them safe...I actually built a designated broody hutch (or rather beloved husband did) with separate run so that momma and chicks are completely separate and safe...better since I use banties to brood predominately who get NO respect, and it keeps older chicken diseases away from the babies until their immune systems develop (from momma's good care and bacteria).
I integrate at various ages depending upon the batch and momma, but 4 to 6 weeks can be a good time as babies can't get trampled on so easily and often are often still kept an eye on by momma. Since my Silkie would brood the "babies" until they were much older, I often turned them lose in the general yard at 12 weeks as a sub-flock giving their immune systems longer amount of time to grow. (Ag literature recommends waiting until 12 to 18 weeks before integrating into the flock for disease protection.)
My 2 cents
Lady of McCamley
Thank you Lady of McCamley,
I am inclined to agree with you given my hens spot in the pecking order. Do you think it will stress her out being moved away from the flock or take the stress off of her? The barn is pretty far away from the coop that she's been used to living in.