Composition (g) of the experimental powdered diets (low fibre control diet (CD), starch free wheat bran enriched diet (WB), type III resistant starch enriched diet (RS), and short chain fructo-oligosaccharide enriched diet (FOS))
| CD | WB | RS | FOS | |
| Starch free wheat bran1-a | 0 | 7.60 | 0 | 0 |
| Retrograded high amylose corn starch1-a | 0 | 0 | 19.95 | 0 |
| Short chain fructo-oligosaccharides1-a | 0 | 0 | 0 | 6.00 |
| Pregelatinised starch1-b | 64.27 | 63.20 | 50.32 | 61.12 |
| Cellulose | 2.00 | 2.00 | 2.00 | 2.00 |
| Casein | 20.00 | 20.00 | 20.00 | 20.00 |
| dl-methionine | 0.40 | 0.40 | 0.40 | 0.40 |
| Corn oil | 2.00 | 2.00 | 2.00 | 2.00 |
| Lard | 6.33 | 6.33 | 6.33 | 6.33 |
| Minerals1-c | 4.50 | 4.50 | 4.50 | 4.50 |
| Vitamins1-c | 0.50 | 0.50 | 0.50 | 0.50 |
The control diet was a low fibre diet containing 2% cellulose.
↵1-a Each fibre source provided 5.8% (dry matter) indigestible carbohydrates in addition to cellulose. Starch free wheat bran contained 78.93% total fibre (digestibility 34.33%) and 0.51% remaining starch. Type III resistant starch provided 30.07% indigestible starch. FOS consisted only of indigestible carbohydrates, the difference between the amount of FOS and indigestible carbohydrates provided corresponding to the moisture of the fibre.
↵1-b The amount of pregelatinised digestible starch was calculated so that the sum of the fibre source plus digestible starch provided 257.1 kcal/g dry matter, as did the 64.27 g pregelatinised starch of the control diet. The energy contribution of the fibre sources was determined as 0.56 kcal/g dry matter for starch free wheat bran, 4 kcal/g dry matter for digestible starch, and 2.1 kcal/g dry matter for FOS.
↵1-c INRA formula No 102.