You are correct, crushed grains will not sprout. The scratch I use is not cracked, The only ones I have seen that are not cracked and or crushed are listed as a number of grains and whole grain. i.e. "5 whole grain scratch". The one I use is from a local feed producer.
Betsyt57,
I purchase bulk scratch grain from a feed store. It is a mix of Millet, Milo, Whole Wheat, Whole Corn and Sunflower. This is what I sprout.
A number of suppliers have what the call a five grain scratch that does not have any processed food.
Yes that type of seed feed can be sprouted. I put a little less than a half inch in a flat pan and wet it well, not submerged then put it in a warm place and it will sprout in a few days.
I only feed use grit in the winter when the ground is frozen and the bird cannot get enough on there own. Commercial pellet and crumble foods have some grit but not always enough if much other supplemental food is offered.