I also don't use grit because I use washed river sand in my coop.
However if your run is bare dirt, I suggest that you start to build up leaves and cut grass, pine needles and such. Bare dirt is unhealthy with no extra microbes and worms to break stuff down Think forest floor!
Having been told chick crumbles are already ground, I also never used grit in the brooder. However I have seen studies showing that chicks fed grit earlier on get more developed gizzards.
However if your run is bare dirt, I suggest that you start to build up leaves and cut grass, pine needles and such. Bare dirt is unhealthy with no extra microbes and worms to break stuff down Think forest floor!
Having been told chick crumbles are already ground, I also never used grit in the brooder. However I have seen studies showing that chicks fed grit earlier on get more developed gizzards.

