I have fed my chicks a starter/grower feed which is good until they start to lay then I switched over to layer feed. I feed differently than most people because I hatch and raise my own birds and I show them at poultry shows, so depending on the season and their stages of growth I change their feed but I still use the same brand just different formulas. I feed a breeder feed during the breeding season to my breeding birds, starter/grower for the chicks, a grower feed while they are growing and a layer during the hotter months in the summer to the adult birds. Every now and then I mix some granite grit in their feeders and some oyster shells. When I start giving the chicks grains and seeds as treats, I put some chicks grit in their feeders. The birds will take what they want. I used to put it in side dishes and eventually it would end up on the ground or floors of their coops so I started putting it in their feed now and then. It works its way to the bottom of the feeders and when I notice it's almost gone, I add more to their feed. I get the chick grit at Tractor Supply Co. I'm sure many won't agree to this method but it works for me.