I mix Dumor (non-medicated) Chick Starter, Scottish Oats, and Alfalfa powder as the main protein for my colonies. I do a partial grind on the chick starter so that nymphs can eat it, but the Scottish Oats and alfalfa powder are fine enough they need no grinding. With 1/3 of each, my protein average of the 3 is 18%. Typically the only part left in the colonies is the larger chunks of Dumor Chick Starter.