Very much a chicken newbie...Questions about offering grit: My 3 chickies are just over 1 week old and eating FRM medicated chicken starter crumbles. This afternoon we had a beautiful Florida day and the whole family was outside, with chickies in a tractor for their first time foraging. I understand that while they are only on starter crumbles they do not need grit (correct?), but when do they need to start grit if foraging outside? The weather is very warm so plan on being out there in a chicken tractor a few hours a day on most days of the week. Because of predators don't plan on letting them free range until much much larger. Also our yard doesn't have many pebbles/gravel (supper sandy FL soil) so want to make sure they get all the grit action they need . Today purchased Manna Pro Poultry Grit (just because I was in town and figured i'd grab it) but the directions say "provide to poultry fed scratch or other coarse grains beginning at 8 weeks of age". Did I get the wrong kind? Thanks!!!!