I'll post some pics when I figure out how
my three rosters crow all hours of the day and night !
Welcome to BYC! You may want to start your own thread to avoid "hijacking" this one. The age of gender differentiation depends on a lot of things -- "sex link" hybrids and "auto-sexing" breeds are able to be sexed at hatch due to distinct differences between male and female chicks. Non auto-sexing/sex linked breeds are able to be "vent sexed" with 85-90% accuracy by experienced sexers as day old birds (this is what you get when you order sexed birds from a hatchery or retail store that ordered from a hatchery - birds that have been examined by a "sexer" and determined to likely be male or female). Some breeds have adult plumage that is distinct between the sexes making it possible to know male from female as the chicks begin to feather in - around 3-4 weeks --- an example being breeds where the female has a salmon colored breast and males have black breast plumage such as the Welsummer, Brown Leghorn, etc. For breeds where there are not such differences, it is generally at the 6-10 week mark when it becomes fairly easy to guess - though some breeds, such as silkies, can take months to be sure of gender. Gender identification is something that becomes easier with experience - so someone who has been raising birds for years may be able to tell at 4 weeks what an inexperienced person is only able to see at 12 weeks or more.
