Check out the website, they had several feeds. The process are not listed though unless you have a customer number which I'm in the process of getting. But that will at least tell you if they have something you want to use.
www.nelsonwholesale.com
There is only one brand that is GMO free. It doesn't state if it is whole grain, soy,and corn free. Now as for dog food their are a few products I use that I would happy to buy the case. Will you be getting it from Texas or pontchatula? The latter is close to me. Pam