I have 3 ten week olds and when I went out there this morning, I found two of them fighting and my 20 week old roo trying to break it up. They kept grabbing eachother by the skin on the head and waddles and wouldn't let go. I didn't see any obvious bleeding but they didn't stop until my dogs broke them up by trampling through them. I know one is a female so far as she does the buck wheat call but don't know what other other two are yet. Is this normal for their age? Oh and they free range with my small flock of chickens. What do I do?