I had a hen hatch out a singe chick, which is 6 weeks old now. They have been separated in one corner of the run so the others can still see them but the chick is protected. Tried letting them out for a bit today and had a couple hens go after the chick pretty hard; one even went after the hen. Momma hen backed one hen off but didn't stop other from going after her chick. I ended up putting them back in their corner of the run. How normal is this? Do I have to not worry and let things play out or should I keep then separated longer until the chick is bigger? Will the other harm the hen when I reintroduce her as well?