aggressive pullets

Hello fellow chicken people! I have a young mixed flock of pullets and one cockerel that are 22 weeks old. I know one or two have started laying and the others are showing signs of starting soon. Anyway, one of my Easter Eggers (I have two) has suddenly started acting aggressive towards me...

I bought a pair of Blue Bantam Cochins in hopes that the hen would one day become broody and help me incubate eggs. The mated pair (one is quite a bit lighter blue than the other) has been quite aggressive and unfriendly to my 4 week old chicks. They are about 3 months old now. Will this...