That is is interesting and so odd! Were the pullets mean too? I have a Buff Orpington hen who is on the low end of the pecking order - i have always considered both breeds to be non-aggressive. Thanks for the heads up! I think I might avoid that mix. Too bad - those are beautiful birds1
Kind of related to Orpingtons, so I am mentioning this. I am giving a second go to Jubilee Orpingtons at the moment. My first time was last year and contrary to what I have read and heard about Orpingtons, they were the wildest chicks, never let me touch them, threw everything around in the coop in their zest to get away from me and as they grew older (more than 8 weeks), the cockerels started pecking my hands as I started to reach out to pick them up. And it wasnt just a gentle get away from me peck, those were violent, grab my skin and not let go pecks. So I had to start wearing gloves before handling them and finally sold all of them (including pullets) for their non-friendliness. They were beautiful birds so I have decided to give another go this year.
So I ordered 3 weeks old chicks again (my fault should have ordered day olds) and they are behaving exactly the same and so are the black mottled Orpingtons. (the mottled are a bit calmer). They are 7 weeks old now, however the good thing is they have not started pecking me as of yet. I am hoping they don't ruin the behavior of the Legbar hybrid chicks I hatched and am brooding with them.
So much for calm and friendly Orpingtons.