Ok, I am very new to all of this and I am realizing that I hadn't researched as much on the feed as I should have. I have my chicks on medicated starter mash, but was reading about giving treats. Then I came across talk of needing or not needing grit with certain foods. Also, I have seen sand mentioned as well. Is sand what you give small chicks, since it is fine, and grit is for older chicks/full grown chickens? And do they always need it, or only when they can't free range (like now, since my chicks are still in the brooder)? Am I correct that the chicks don't need sand or grit when they are just on starter or layer pellets (later), but if they are eating bugs or other treats/foods they will need it? What type of sand? Thank you so much and sorry for my cluelessness!