Eh...not sure.so the littles will be 9 weeks tomorrow do they still need chick grit or can they have the same as the ladies?
http://www.jupefeeds-sa.com/documents/GraniteGrit.pdf.
I bought about a 2 gallon bag of granite grit from the local mill, they put it in their chicken scratch. Ran it thru a colander with 1/16" holes. Bagged the smaller stuff for the chicks and sprinkle some over a chunk of sod in the brooder during the second week.