I Googled "lesbian chickens" and only came up with a couple of hits, so I am turning to the great knowledge of BYCers on this topic...
Here's the story:
I have a barred rock, Tux, who is one of my sweetest hens and also one of the hens that my roosters rarely mount. Rare is the rooster who'll set her running; mostly, she just fluffs up her feathers, lifts her wings up, and sasses them back until they leave her alone. In fact, it almost seems like she purposely walks towards them when they're "in the mood" -- acting aggressively to deter them from even trying.
Well imagine my surprise when, half an hour ago, I glanced over at her in the chicken yard and saw a RIR HEN mounting her. And she wasn't putting up a fight. About 30 seconds later, this same RIR hen was mounting another RIR hen. And I do mean mounting -- fully up on top, and doing her best (or so it seemed... I wasn't watching too closely) to, well, you know. (Let's just say, she was arching.)
Anyway, what I found on Google only referred to this behavior in the absence of roosters. I think it's fairly common in the natural world for a top female in an all-female group to start acting like a male. But I have a ridiculous number of roosters right now (about 15 awaiting freezer camp, and another 5 that I'll retain for breeding). My poor hens' backs look terrible, some of them actually have bald spots, and now... I have hens mounting hens?
Does anyone have experience with this? A sidenote: this RIR hen has no mussed feathers on her back, so I'm guessing she's also rarely mounted by the roosters. Since I can't really tell my RIRs apart, I don't know too much about her behavior besides that.
Holy moly. I started out with 25 chickens all the same age, and now I'm up to over 70 at every age possible. Sal favs, BBS Orps, Buff Orps, partridge silkies, and assorted hatchery birds (I do love my EEs).
I blame BYC!!!