Hi I have nine big hens that are one year old and a rooster same age i also have a rooster and two hens that are 20 weeks old I give them grower feed and oyster shell in the food I can't put them on layer cuz I have a broody hen with a three week old chick that can't have it are the two 20 week old hens not laying cuz they are not eating layer I give oyster shell in there food