I am having trouble finding a feed that isn't too high protein for my call ducklings that hatched yesterday. I got a 50# bag of Purina Duck Grower that is 16% protein. If I grind that up in a coffee grinder will it be okay to feed to my call ducklings until I put them on the mazuri maintenance that I have my adults on? I wanted to get the mazuri starter, but they don't carry it anymore. Would love some answers asap as I have yet to give the little guys food yet and am waiting to open the bag. Thanks!!!!