My Birchen Cooper maran roo who's aprox. 7 months old has been pecking at his chicks lately. My Silkie hen hatched the babies inside away from him. I've been letting the babies free range (with me on guard) but he's going after the chicks. My roo is a great protector, he loves his hens, and has never been nasty to humans. He even makes the girls their nest, and lays next to them while they lay eggs. Could he be seeing them as 'newbies" to the flock, since she hatched them inside, and not in his presence? The chicks will be 2 months in January.