My Guinea's are about 13-14 weeks old...
I am pretty sure there are 3 females out of the 5. I was just wondering when they start laying. A hen lives with them.
Usually the spring after they hatch. So next spring if you're in the northern hemisphere. I'm not sure exactly when because in Australia they lay October to March. If you're in the Southern Hemisphere I'm not really sure but mine start in October. They will be about 17 weeks?