I have a hatchery Dark Cornish. He was raised in a grow-out pen until he was almost a year old, with a head rooster and some mature hens he wasn't allowed to touch. When I put him in the breeding pen with his 3 ladies, there was a learning curve for him. He wasn't especially gentle with the hens at first, he was too hormonal...but he did always call them for treats. It's been a few months now and the ladies dote on him and squat willingly. He shares his pen with 6 pullets one of his hens brooded. they're not quite 3 months old and he mostly ignores them, occasionally calls them for treats. He's never, ever made an aggressive move toward me.