Mama and babies were never seperate from the rest, and the 17 juvies had 2 weeks of integration before moving into the main enclosure. Everyone was fine, the hens a bit snippy,but it has gotten worse and the rooster is joining in, even to the 6 babies who he previously ignored. It is stressing their mum out too.
The Alfa hen will always ' call the shots ' , I would remove momma and chicks from the danger.
I have 6 chicks currently in a coop inside the coronation run. They are 7 weeks old and I let them out during the day then they return to their own coop at dusk. They will eventually assimilate into their own coops by breed but generally not until they are similarly sized to the birds they are to join. Usually 12-16 weeks, depending on breed. Silkies are usually the exception .