I am brand new to chickens and have nine 10 week old Easter eggers. I believe 3 or 4 of them are cockerels and I am wanting to keep one. I have read a few articles that ALL Easter Egger roosters are aggressive, is this true? Are there any warning signs to look for that a cockerel will end up being an aggressive and mean rooster? There is one that is already very dominant and the others seem to be more laid back.