I have 3 & 4 week old chicks. We haven't put them out yet and still have them on Purina Start & Grow medicated feed. When do I give them the grit? I bout some Parakeet grit just in case. Do you give them free choice of it at 8 weeks or when they go outside? My uncle raised chicks for about 10 years and he said I should get some fine sand and sprinkle it on their food. Not sure what or when to give to them. Just to let you know, we do not have any gravel or rocky areas anywhere around here. Planning to free range. We have caliche but that's about it. If you know about ducks, geese, and turkeys as well it would be helpful. I noticed some people weren't inclined to use Parakeet grit because of the calcium in it, why? Thanks, Sara M.