Quote: The birds that are not easily told gender at hatch (ie: Not a barred rock, sex-link etc.) they do what is called vent sexing. This method is used by most hatcheries and even though it is pretty accurate there still is a small percentage that you could get the oppisite gender in which you ordered. If they are labeled "Straight Run" then those chicks are not sexed and more then likely you will end up with a rooster. But if you order "Pullets" you have a good chance of getting all girls.