mounting behaviour

Hi everyone, I just joined and from reading other threads, I think I know the answer but I want to be sure. So I've raised Henrietta since a chick and we always though she was a hen. We have recently introduced new mature hens and now she is mounting them, chasing them and making this gawd...

So right now we have chickens at the age where they are just about to lay. We have two roosters however one is a mini silkie rooster who hasn’t even crowed or anything. My main question has to do with our main rooster Ducky. Recently he’s become very interested in mounting his ladies. However...

So, we've observed one of our six-month old hens mounting a lower-tier hen of the same age. The mounting hen is not top hen, as far as I can tell, and seems to be mid- to low-tier herself. The mounting has happened three times that we've seen, which makes me think it's actually happening lots...

Words of wisdom and mainly observed behaviours wanted on our 8 bird flock! I think we have quite typical behaviour, but interested to know if anything is unusual. The flock consists of 4 x hybrid Lohmann Brown hens (bought at POL, now ~70 weeks) and 4 x Gold Partridge Brahmas (incubator hatch...