I have added 4 new pullets 10 weeks old in with the 4 10 week old pullets ( i hope) will have to send pic's so i can get help on breed and gender but i know the 4 i added are pullets 2 brahamas and 2 EE's anyway could keep them apart for a while as space is limited so I placed them in the coop with the others so how long will the others keep picking on the 4 new hens