2.1. Animals and housing
Seven finishing pigs that were the offspring of F-25 females that were mated to G-Performer males (Genetiporc, Alexandria,
MN) with an average initial body weight of 70.1 ± 6.3 kg were used. Pigs were surgically fitted with a T-cannula in the
distal ileum (Stein et al., 1998) when they had a body weight of approximately 25 kg, and all pigs had been used in a previous
experiment before being assigned to this experiment. Animals were allotted to a 7 × 7 Latin square design with 7 diets and
7 periods. Pigs were housed in individual pens (1.2 m × 1.5 m) in a temperature controlled room. Pens had smooth, plasticcoated
sides, and a fully slatted tribar metal floor; a feeder and a nipple drinker were installed in each pen. Pig weights were
recorded at the beginning of each period to calculate feed allowance during the following period