For anyone reading this advice: check the labels on the bags available to you. It varies from one brand to another, and may change any time the company changes their recipe.
For an example of the variation, I just checked a few websites. Purina's website has their flock raiser at 20% protein while the chick starter is only 18% protein. Tractor Supply's website has Dumor chick starter at 20% protein, while Dumor All Flock is down at 17% protein. Also on Tractor Supply's website are chick starter and all flock from Nutrena Naturewise, both at 18% protein. And if anyone is reading this post a few months or years later, they will probably find that the protein levels have all shifted around again.
