I have a cuckoo Maran cockerel that is almost 7 weeks old, and he is becoming a bully to the other chicks. He pecks their head really hard and holds on for 5-10 seconds. I’ve never owned a cockerel before, so is this normal behavior? I get that they are establishing the pecking order, but this seems a bit extreme. He made one of my d’ Uccles bleed on its head (the blood is dry now), so I’m not sure what to do. I’ve separated him in a brooder area for right now, but any help is greatly appreciated!