I think one of the reasons people think vegetarian chicken eggs is better is bc of the mad cow thing a while ago. There were quite a few reports of how livestock were fed animal products (sometimes of the same species) and in general people thought it was a bad idea. After that, labels that said "corn fed" and "vegetarian diet only" kept popping up. I don't know enough about non-veg animal feed to comment otherwise, but I remember that people discussed all livestock raised, not just cows at that time. If I could find soy-free feed locally that wasn't double the price, I would feed it. I can't afford to have it shipped to me, though. I don't go through enough feed to have it justify the expense. I keep asking at my local feed stores, and I'm hoping someday they stock it.