Oh, I didn't realize that we were talking about young chicks. I serve my hatchlings the grounded pellets as well since I am concerned that the regular pellets would pose a choking hazard at this stage in their lives.
I normally buy pellets, bags of sunflower seeds, dried beans, oats, wheats, and other things, then mix it all up in a trash can (dedicated only to their feed). Chickens will eat what they like...
:welcome Thank you for joining our happy family. We are here to offer help in any way. As for grinding the pellets down, I think it would be more effective to purchase whatever feed you think will work, and then mixing in the current feed with it. Just my 2 cents.