I have four chickens, two amber link and two black sex linked. The two amber links have gotten into the habit of chasing away and pecking at my littlest black sex link. (She has had her feather plucked and has multiple fresh wounds that never seem to get the chance to heal) I want to find a solution that allows me to keep them all. It’s not because of boredom as they have had a lot of new things to play with. We did cabbage cabbage hanging from the ceiling and I got them a mealworm dispenser that they have to kick around. When I remove the bullied one she is much more relaxed on her own. How do I prevent future bullying?