It should be getting more obvious. If you have the same breed, the roosters will have redder larger combs and a larger crease in the middle of their chests. If you have a mixed flock it might be necessary to wait until you actually hear them crow. Hens of some breeds end up with large beautiful red combs too. Young roosters can start crowing between 3 and 4 months old.
A Black Star rooster has a white dot on its head, where the females do not. Black Stars as sex-link chickens meaning you can tell their sex by their color once hatched.
They belong to white
Not if the birds are young. The older birds have grown using muscles heavily and will be less tender but the flavor will be the same.
I am not sure if you are talking about a hen foot or a rooster foot as in math, because I have not heard of that, but if you are talking about the bird chicken, an adult rooster usually has a spur (hard, naturally pointed growth) just above his foot, while a hen usually has just a small bump in the same spot.
Silkies are hard chickens to find out their gender. Either you can vent sex them, which should only be done by a professional because you can hurt or even kill your chick. Or you can just wait until the chicks are old enough to lay eggs or if it crows.
http://www.youtube.com/watch?v=ircubXfYfdU&feature=related http://www.youtube.com/watch?v=QBFwVa0qW74&feature=related
By verbal communication, and even by sight. To a human all chicks peep the same, but to a mother hen, she can tell which chicks are hers and which are not.
If they have a comb
how can you tell the difference between a tortoise and a turtle by shell in picture
Can you tell the difference between Vyvanse and Concerta in a drug test
Let Me Tell Ya 'bout Black Chicks was created in 1985.
Sexing chicks is a very difficult job to do well. Sexing or identifying the sex of a day old chick by looking at its sexual organs is done by very few very well trained people. It is called Vent sexing. It takes a long time to learn how to identify the more than 15 different shapes of the cloaca. Chicks are often damaged or killed by squeezing them too hard when done by a novice handler. It takes years to learn how to do this right on top of learning what you are looking at.