The effect of oligofructose and inulin on faecal characteristics and nutrient digestibility in healthy cats

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Abstract
The effects on faecal characteristics of different concentrations of oligofructose (0, 3, 6 and 9%) were investigated. The 6 and 9% supplemented groups differed significantly compared with the control group in almost all faecal characteristics. There were no significant differences regarding the macroscopical and chemical aspects of the faeces between the control and the 3% supplemented group. There was a trend for a lower pH of the faeces in the 3% supplemented group, suggesting a substantial effect on the faecal composition. In a second experiment, the effects of oligofructose (3%) and inulin (3 and 6%) on digestibility parameters were tested. In the supplemented groups the apparent protein digestibility was lower but this was due to a higher bacterial nitrogen content of the faeces. There were no significant differences between 3% inulin and oligofructose, although oligofructose seemed to be more easily fermentable, because of a trend to a higher concentration of short chain fatty acids (SCFA) in the faeces of the oligofructose group.