No. Too much of anything can be bad. What are your issues with soy and corn? Yes, I'm well aware of what you mean by "Organic"
Meat birds (CX) are best raised end to end on a high quality 18% protein feed. Layers are best started on a 20-22% starter. I transition mine to 18% and then to 16%. There have been cases where free feeding whole grain feed has caused health problems, but folks I know who use grain based feed, feed twice per day to eliminates cherry picking.
In my opinion, the best vitamin pack (or base element for feed) is Fertrell, but it's pricey. So Fertrell based feeds will be more expensive than other based feeds, but you can still get a wonderful feed for about $16 per 50# bag. You might want to use
their web-search to find a dealer near you. If the dealer doesn't make feed, he/she probably knows who does. And those folks often have distribution routes.
Next up are farmers who feed what you want, they buy in large quantities and are often willing to sell a bag or two or increase their order to add you on. If their having it shipped a few more bags to distribute the freight cost is a good thing. Farms that feed what you are looking for can be found at
APPPA or
SPN.
It's going to be difficult to find good feed without both soy and corn, but both get a bad wrap often without truth being considered. I prefer feed with whole roasted soy as the birds waste less of it and there's no chance of a bait and switch with whole.
Also look for Mennonite and Amish farms. They'll often have what you're looking for at very reasonable pricing. But they generally don't advertise and many won't have phones.