Personally, I do like to offer some treats for chicks to investigate. A slice of cucumber, a broccoli spear, a couple of finely chopped grapes or small stalk of kale, a sprinkle of oatmeal, etc. As @AllenK RGV mentioned they need grit to process foods properly. I usually place a small dish of grit in the brooder-they will take what they need.
Poultry Grit (crushed granite-insoluble) comes in a few "sizes" most commonly found is "Chick Grit" and "Poultry Grit". Even if chickens have access to dirt/soil that might contain small stones-I still make grit available. You can toss a little in the run or attach a cup to a post somewhere and keep some grit in that-they will take what they need.
Oyster Shell is a soluble form of Calcium. When your girls are coming into lay, provide that free choice as a Calcium supplement-they will take what they need.
Poultry Grit (crushed granite-insoluble) comes in a few "sizes" most commonly found is "Chick Grit" and "Poultry Grit". Even if chickens have access to dirt/soil that might contain small stones-I still make grit available. You can toss a little in the run or attach a cup to a post somewhere and keep some grit in that-they will take what they need.
Oyster Shell is a soluble form of Calcium. When your girls are coming into lay, provide that free choice as a Calcium supplement-they will take what they need.