One final thought, is.... Offer Chick Grit! as soon as you take them off of pure chick grower they will require those crushed rocks free choice. Best regards!
I would think anything they will eat is just food. I doubt you could get them to eat the last half of a box of thin mints you bought at the movies last night. The treats I offered my chicks were cockroaches I vacuumed up in the dustbuster and fruit/veggies from the fruit stand. I live in south...