Ok, pardon me here, as I am very anti organic(I know, oxy moron) But we try to do things natural. Natural and organic are 2 different things believe it or not.
Organic, whether its with crops or animals, means you can't use any chemicals, anti biotics, medications etc etc. Everything has to be certifed organic that you feed your animals from feed to minerals and hay. If your animal is in a situation where they are in a life or death situation and require anti biotics you can give them antibiotics, but its a last resort, then after giving them the anti biotics they have to be sold when they recover. There are many other things and its not worth it imo.
We prefer natural because when we need to we still have the option of doing things conventionally if our goats are sick. We do things natural and market them as natural and we have no problems selling to our customers.
We are farmers, we farm quite a bit of land and we do it all conventionally. The practices with our farming and the practices with our animals do not cross. We are conventional when it comes to our farming, we spray chemicals, we plant GMO crops, we are constantly getting bashed by organic people. They just don't get it. They think we can just snap our fingers and change our ways. Yeah, right. I still don't get why they don't allow fertilizer(ie lime, potash, etc) it comes from the ground and its not processed. And GMO(genetically modified organism) because of that, we are actually spraying less chemicals on our crops than we were before.
We rent all of our land and it takes a minimum of 5 years for transitioning to even consider the land to be organic. 5 years, if we were to lose that land all of our efforts would be lost. We can't stand for crop loss either with the organic grains. The list goes on and on.
I am very opinionated on this subject and I could go on and on and on........
Anyway, for grain, oats, barley and wheat are most commonly used as covercrops for hay. That means that they are not commonly sprayed, and if they are sprayed, it is before the plant has a head and it does not affect the grain(ie residue) same with BOSS, it's not a cover crop but they don't spray it for anything. With corn, we don't like to feed GMO corn to our animals. We will our chickens if that's all we have(in fact, our chickens grew better on GMO corn, can't figure that one out) but we will never feed GMO corn to our goats. If you feed corn to your goats and care about being natural, look for corn that is non-GMO or organic.