He's only going after the standard pullets in the group of chickens he was integrating into the older flock with - all 12 weeks old. He hasn't messed with any of the 2 year old hens. This morning I saw him tidbitting for his girls, and not one came to see what he found. I don't know if it's due to his size or because of his looks (Bantam Frizzle Cochin), but the young pullets really don't pay that much attention to him - other than to see if he's coming after them. As the flock travels around the yard - free ranging, he's usually bringing up the rear. He has decided he really likes my White Cochin, Blue Splash Marans, and my Bantam Mottled Cochin, but his tactics are really off. He chases them down then grabs their head and pins it to the ground while they scream in protest. He doesn't release them - they usually wriggle feel, but not without losing a mouthful of head feathers. I haven't seen him prance around or do the pre-cursor mating dance before trying to grab them, and I haven't seen him try to mount any of them from behind. Although none of them squat down for him to mount either. When do pullets learn to squat down for roosters to mate?