Chickens are pretty attracted to a food particle that looks like cracked corn ... so I'd think putting them through the mill would make the grains more attractive.
I have also been thinking about how it would be a double-bonus to the nutrition to sprout (or at least soak) and then grind and then ferment all the grains, seeds and legumes in the poultry feed. But that's asking a lot from me. The big-girl-pants-wearing me inside me has dreams of buying all whole grains for everything, even human food, sprouting them, dehydrating them, milling them ... yeah right.
One, but just one of the things we're doing with fermentation is reducing the anti-nutrients in the ingredients (grains, seeds, legumes, and possibly nuts). This article ... http://www.thenourishinggourmet.com/2010/09/reducing-phytic-acid-in-grains-and-legumes.html ... has a lot of scientific, historical, multi-cultural & easy-to-read information about this particular benefit of fermentation.
One of the interesting things about that article is it discusses how some grains (rye and wheat) have lots of phytase (the enzyme that breaks down one particular anti-nutrient called phytate) and other grains (oats and corn) have not as much phytase but still have plenty of phytate (the anti-nutrient). So ... using something like freshly ground rye in your batch of ferment can really help the anti-nutrient reducing process reach maximum benefits.
But ... using sprouted flours is even more efficient. Here is a quote:
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High Phytase Grain added to Low Phytase Grain: Adding a high phytase flour, such as buckwheat, rye or wheat to a low phytase flour or grain such as oats, rice, millet, and corn, can help break down the phytic acid. Think of cornbread with corn and wheat flour. That’s a pretty classic combination and if you soak the corn and wheat flour together you will be able to more effectively reduce the phytic acid in the corn. You should also do this if you roast grains (the roasting adds flavor as well as reducing phytic acid), since the phyase will be deactivated through the roasting process.
Using Sprouted Flour: Even more effective would be adding sprouted flour as the phytase is already active and ready to do business! From the few studies that I read who used this method, it seems that it could be quite helpful in reducing phytic acid. We can make our own and simply grind it as needed. If you don’t have your own grain grinder you can just buy a cheap coffee grinder and grind enough to add to your projects. The one study that we read about up above used only 5 to 10% sprouted flour, so it doesn’t have to be a high percentage.
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Note the advice in this article to grind the grains to help extract the proper nutrients and assist with the fermentation process. I think whole grains & legumes look great, and I do use them as treats, but for the feed I believe "processed" grains are better for the birds.
It all has a most sound base and I highly approve of sprouting. However, you know your strength. I don't have my grinder put together yet but I do intend to grind oats and corn(because I bought a bag of it) If you can hold up to it sure do it. I know my limits and sprouting is a lot of work. I only tried on one batch of whole oats and it was a miserable experience. I'm going to buy some wheat from Walmart's so I can sprout and grind my own sprouted flour. I think to get flour you have to send it through several times. But how often am I going to make bread?