Grit?

[Pilot2012]

When should grit be introduced (what age) to chicks diet?

 

[aart]

best to provide them some from the get go as it help to develop a strong gizzard.
http://www.jupefeeds-sa.com/documents/GraniteGrit.pdf.

When should grit be introduced (what age) to chicks diet?

See the link above.
"Baby chicks and poults can mistake grit for feed with damaging results. Help them establish correct feeding habits by sprinkling grit over their mash or grain for the first two days. Then feed GRAN-I-GRIT in separate hoppers"