Only the "pros" can vent sex and it is not something generaly done by non Hatchery people.
I am fairly sure any chicken breed can be vent sexed for Gender. From what I have read, it is an art form and someone has to teach you. Some are better at it than others too.
I thought they could only vent sex certain breeds not BCMs? When I did a search on sexing BCMs there was nothing about vent sexing as an option. I know you can vent sex but again I thought there were limitations? If this is the case than how come I dont here anyone speaking of this method. I f you cant it seems a bit odd they would offer it for BCMs.
Is this a Hobby or a way of Life? Chickens: Australorp, Barred & Partridge Rock, Hatchery & Heritage RIR, Golden Comet, Marans, Easter Egger, Silver Gray Dorking, Basque Hen, Partridge Penedesenca, Olive Egger and UofA Blues