ADM Alliance and Faithway feeds still contain animal protein from porcine products. In my local area, they sell a 22% layer pellet, but there is a 16% layer called Pride & Pleasure from Faithway that still contains animal protein. I like the feeds as they are basically dust free, skinny pellets, and overall excellent quality.
It could be the soy, but I've heard conflicting reports on that. Some people are going out of their way to avoid the soy based feeds because of what they've read, as daunting as finding any with animal protein in them.