For human to grow well they need balanced diet in their food likewise it apply to the birds also that is they also need balanced diet for them to grow well and develop.
The chick need protein,minerals, vitamins and minreals for them to build strong muscles ,feathers and a good immune system. For the first few weeks the birds needs alot of proteins. For the feed am using protein there is 23%, fat is 5.8%,crude Fibre is 4.2%,calcium is 1.3% and so on.
For the first two to three weeks I will be giving them this starter product .
Giving your birds the best quality and the beginning helps your birds to have good and healthy birds and it like a builder who make strong foundation an anything put on such foundation will stand still abd not crumble.
Don't forget that proper nutrition helps your birds to be healthy, strong and grow well.