I have 3 Rhode Island reds cross white that are about 5-6 weeks I think and 2 Rhode Island Red Cross australorps about 2-3 weeks. These are inside ATM and the other 3 are out in pen. One of the big girls pecks the black babies when I have them all together free ranging for a bit each day so a bit worried about that. I've never had chickens. The big girls can fly over the chook fence now into the yard and free range which I didn't mind until I found them in neighbours yard today which I'm a bit worried if it becomes a habit. We don't have much grass at all in our yard. Need to see what I can do?