I got a sneaky Roo and Hen. I know they mate cause my hens always missing wing feathers by her back. My Roo is very large so I guess he doesn't have to hold onto her neck cause she never missing neck feathers just he just sits ontop and that's it. I also know for a fact they mate cause her eggs are always fertilized and I've hatched some. He has never done the chicken dance or any mating ritual but they were raised together and he is the only roo kept with her and I hear that's common. Only thing he does is have a crowing contest with my other roo who is in a enclosure by him self. My other roo does the dance when he sees her from his pen and does that cluck cluck pick up food and drop in while he eats but my Roo that's in with my hen doesn't do it. My chickens get checked on every few hours every day and also many times a night. My kids check on them all the time and my chicken pens are like 15 feet from my bedroom window so I hear everything. Never do we see him mount her.