Diets
One group was randomly assigned to
receive a high-protein diet (HP) and the
control group received a normal protein
(CP) diet.
Both diets were extruded, dry
diets with a moisture content less than 10%.
Diets were formulated to be as similar as
possible, with protein-containing ingredients
in the HP diet substituted for ground
yellow corn in the CP diet.
Diets were formulated
to contain 30% (CP) or 40% (HP)
dietary crude protein, on an as-fed basis.
Key ingredients and nutrient analyses are
shown in Table 1.