Hi - I just got my baby chicks on Tuesday! So exciting - I'm a first-time chicken parent. My question is about giving them grit. I've looked at all my local suppliers and none of them carry chick grit. My question is... I read somewhere to go out and dig them a nice clod of turf and they would get their own grit out of it along with grass, weeds, and bugs (we don't use any chemicals on our lawn). They are about 4 days old now - does this sound like a good solution and are they old enough for this? Thanks from a nervous first-time chicken mom.