Dairy cows long have been known as efficient converters of roughage into milk. But they can convert grain into milk, too, and conditions sometimes favor high-concentrate rations. It looks as if now is one of those times.
Van Horn, Harold H.
"What About High-Grain Dairy Rations?,"
Iowa Farm Science: Vol. 16
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol16/iss11/4