a final period in which the W20 diet was amended by replacing
10% ground corn with 10% dried, pelleted BP
(BP10 treatment). The specific diets were fed sequentially
to all eight cows over four 17-d periods (12d adaptation,
5d of measuring), because previous reports suggest that
SARA was not immediately and easily reversible [15,16],
making other experimental designs (e.g., a Latin square)
problematic (e.g., carry-over effects).