So... a few days ago my mum noticed a hen mounting another hen, never thought anything of it. Now for the last several days, I myself have seen it...quite the spectacle really. I have a hen/pullet, about 10 months old, who is mating her sibling (were hatched from the same batch of eggs). I only kept two of the last batch...and they seem to be in love. The one hen has a bald spot from being mated so much !! by the other hen !! The two of them are in a flock of 13, including the rooster. So, not sure why the behaviour, when there is a roo in the house. When this hen is mounting the other hen, she does the exact same maneouvres as what a rooster would do....everything ! The only thing she doesn't do is crow. So...not sure what to think about this gal... she's an odd one. The pair of them are quite strange, the other flies in my face every chance she gets... The both of them are quite odd.