This way ladies...
Featured Stories on BackYard Chickens
Eat them. They are delicious.
On another note, if you keep only females, they will be much noisier than if you keep only males. Since the "buckwheat" is also the hen's call for a mate, they are likely to never stop making the buckwheat call.
In a mixed flock the buckwheating can get really bad up until the hens have chosen their mates. Once they are paired off the buckwheating greatly decreases until the next breeding season or if a hen loses her mate she can begin calling for him pretty much non-stop.
Hens are much easier to sell than are the males.