The dietary needs of a grower layer chicken aged between 9 to 20 weeks are quite different from a starter. Grower feed essentially consists of protein content, which is between 16 to 18%. The feed has an energy content of about 3000 Kcal/Kg.
However, it has a higher amount of calcium when compared to regular broiler feed to keep the eggshells clean, crisp, and crunchy. The dearth of calcium in layer feed can lead to poor or no egg production, eggs with a thin shell, egg-eating habits, and cannibalism among the birds. Feeding eggshells to laying hens for calcium is not a good idea as they are harmful for digestion. Egg-laying hens need at least 4% of calcium. In short, grower feed helps the constant growth of your teenage chicks without supplying them with an unnecessary amount of minerals and vitamins. Such elements are more important for fully grown layers.
Make sure that you serve feed twice or thrice a day till the time they are 18 weeks old.