Yesterday I added six 3 weeks old Barred Rocks to my flock of six 5 weeks old Red Sex Links. They all seemed to get along but this morning I noticed my Reds were keeping my BRs from the feeder and water so I put another feeder and water on the other side of the coop and the poor BRs started eating and drinking inmediately. We stayed there for a while to make sure they got plenty without the Reds bothering them. Same thing tonight, but I just want to know if my Reds will eventually accept them so that I can stop worrying.
I'm already in love with my BRs, they are so much friendlier than my Reds. I don't want anything happening to them. 

