My first batch of Buff Orpingtons were supposed to be "vent sexed pullets" but 4/5 were obvious boys with huge red combs and wattles by 5 weeks old! I bought a couple of older Orps to try and even my odds of a pullet, but one turned out to be a boy once his second batch of feathers came in. I could use your lucky. Mine has been dismal buying straight run and even worse buying "pullets" hahaha
Wow, 4/5 were boys, that really does stink! Sorry you've ended with so many boys. I wish you better luck in any future chicks yiu get
On a side note, one of my Barred Rocks squatted yesterday so hopefully will be seeing eggs soon.