I have 5 rhode rhode island reds. They are 23 weeks old and 22 weeks old. But no chicken has laid an egg yet. I feed them layers pellets and give them a few scraps from the kitchen(corn, lettuce and bread). I have recently brought some oyster shells for them as well. Three of them have a redish face, two of them with small waddles and comb, one with quite a big waddle and comb. The other twos faces are pale and they have a very short waddle and comb. I think they are the ones that are 22 weeks old. Also they don't seem to be going in the nesting box. It is 80cm up and there is a perch at 40 cm. I have put real eggs in there from the fridge. When I change their straw they rush in and stay in there for half a hour then come back out without laying a egg. Thanks to all those who comment.