First timer here... I have done so much reading on this I have gotten confused now... My chicks are a week old, and my local feed store told me to start them on chick grit at two weeks old. I have read that giving them a clump of dirt from their future run helps expose them to things so they can build immunity slowly and it also provides them with grit that they can pick out of the dirt. This seems more intuitive and I don't want to pay for rock if I can just get it from my yard
We are in Colorado, so our soil is very rocky. SO...
My questions are:
1. Is the whole dirt for exposure thing legit and can they get the grit they need from it?
2. At what point should I do this? Is 1-2 weeks too early? Should I wait until they are older?
3. Do I leave the grass attached to the dirt, or just put straight dirt in?
I should add that we are considering introducing some treats later this week (not sure what yet, any suggestions?)- so they will be needing grit soon... So far, they've just had medicated chick starter. And we haven't taken them outside yet, as they are so little and it hasn't warmed up enough yet.
Any advice is greatly appreciated.

My questions are:
1. Is the whole dirt for exposure thing legit and can they get the grit they need from it?
2. At what point should I do this? Is 1-2 weeks too early? Should I wait until they are older?
3. Do I leave the grass attached to the dirt, or just put straight dirt in?
I should add that we are considering introducing some treats later this week (not sure what yet, any suggestions?)- so they will be needing grit soon... So far, they've just had medicated chick starter. And we haven't taken them outside yet, as they are so little and it hasn't warmed up enough yet.
Any advice is greatly appreciated.