I've witnessed one of my pullets (crazy Gertie) come over and peck at the cockerel when he mates with others. He reminds her that he's boss as soon as he's done (a couple of pecks and a dropped wing dance) and she actually puts up a bit of a fight before acquiescing. She also pretty much throws herself at him with the preening and "accidentally" bumping up against him. She's getting her fair share of loving so I can't figure out what her problem is other than that she doesn't want him mating the other gals. Has anyone seen this sort of behavior before? Are chicken brains capable of jealousy?