Hi Neil,
I roll my locally sourced barley (sorry , no help , I live in France) for my pigs with an ancient motor powered mill.It does take time , but it is worth it as it significantly reduces the overall feed costs if you compare to feeding pig nuts alone. We get through a couple of dustbins full each day , and when mixed with veggies, a little stale bread (not too much),eggs and milk or water , it makes a more varied and interesting diet for the pigs.I believe nutritionally, it is reasonably well balanced in protiens and carbs.
Didn't know about the dust and farmers lung Russ , so thanks for that important point, it does make sense.Will buy a couple of masks tomorrow.
Jim