Distillers Grains are a cereal byproduct of the distillation process.I got a response to my email query from Blue Seal/Kent Nutrition Group...
So that's encouraging. now I just want to know more about these distiller grain shipments..
There are two main sources of these grains. The traditional sources were from brewers. More recently, ethanol plants are a growing source. It is created in distilleries by drying mash, and is subsequently sold for a variety of purposes, usually as fodder for livestock (especially ruminants). Corn based distillers grains from the ethanol industry are commonly sold as a high protein livestock feed that increases efficiency and lowers the risk of subacute acidosis in beef cattle.
I asked him for a detailed report back on their guidelines and explained we are feeding the entire farm purina products and want an on going communication based on nutrition and needs. He was excited to discuss and said he would be in touch via email in a few days. (he is on the road currently) I have to say, I have the BEST feed store (who delivers to us every other week!). As soon as I mentioned this he called our rep, who called me back within 30 minutes.

