Hello
If your chickens are young, the combs on their head will be pink, once they turn to bright red, they should start laying eggs.
They spend their first 21 weeks making feathers, and once mature and their feathers are all grown, they will start going into red combs and start laying eggs.
Hens can only make feathers of eggs, as they need a lot of protein to make both, and cannot do it naturally.
I hope you enjoy your hens, if your not sure what sex they are in a few weeks the cocks willstart fighting over the ladies, the best thing to do if you have a lot of cocks is move them into a separate pen and feed them corn for the table.
Welcome to the forum from Me, Julie, my husband Joe (chicken specialist - has bred over 50 different breeds) and our 11 year old pig advisor and shower, Tara x x x
Julie