If your chicks are in a brooder and only eating chick feed they don't need grit.Adding to the grit question. Mine are in the brooder. It says to give grit at about 3 to 4 weeks old. The grit looks to big for them that I have. Actually I been giving it to the older chickens. The bag says all types of chickens. Can I take that and hit it with a hammer to crush it? For the newborn chicks. When they are old enough to take it.
I personally have never bought "chick" grit. I buy Poultry Grit and I offered it at day 3 because I feed things beside just chick feed.