Barrows were randomly blocked as pairs by crate assignments and randomly assigned to one of the two experimental diets as treatments within blocks.
Period one of the experiment was a nine-day diet acclimation period followed by a four-day total collection of urine and
feces
There was a two day rest between periods, with a dietary treatment switchback occurring at the start of period two, which
also was comprised of a nine-day diet acclimation followed by a four-day total collection of urine and feces
At the start of cach period, barrows were weighed and placed in individual, raised metabolism crates
Crate assignments and placement within the room were identical for period one and two
Crates allowed for separate but complete fecal and urine collection