Please help, this is my first go around with chickens and I couldn’t love these babies more. But 2 of my chicks, one Barred Rock and one Black Sex link is pecking at my Rhode Island White. They are about 6 weeks old, I’ve been giving them starter feed, has 18% protein, I give them hard boiled eggs here and there, I’ve put salt in their water to help with any other deficiency. I don’t know why they keep picking on her, and she is so sweet too, she’s very docile, she doesn’t even peck back, she just gets up and moves and they just keep getting back at her. The free range throughout the day so I know they have a lot of room. I just don’t know what else to do.