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The use of exogenous feed enzymes in reducing the anti-nutritive effects on dietary fibre in dog foods

Twomey, L.N., Pethick, D.W., Choct, M., Rowe, J.B., Pluske, J.R., Brown, W. and McConnell, M.F. (2001) The use of exogenous feed enzymes in reducing the anti-nutritive effects on dietary fibre in dog foods. Recent Advances in Animal Nutrition, 13 . pp. 179-186.

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Abstract

Dietary fibre is included in dog foods primarily to ensure good faecal quality. Too much dietary fibre, however, can have anti–nutritive effects. These effects mainly consist of reduced nutrient and mineral digestibilities and poor faecal quality. Increasing the level of dietary fibre in the formulation of dog food is desirable because these ingredients tend to be inexpensive. Therefore, enhanced breakdown of dietary fibre within the gastro–intestinal tract would be advantageous, and may allow increased inclusions of fibrous ingredients in dog foods. One method of achieving this is to add exogenous feed enzymes to the food. Two experiments were conducted to investigate the effects of soluble dietary fibre, phytate and exogenous feed enzymes in dog foods. An increase in the soluble dietary fibre (non–starch polysaccharide, sNSP) content caused reduced nutrient digestibilities, increased fermentation in the large intestine and resulted in poor (moist, loose) faecal quality. The addition of the appropriate feed enzyme reduced these effects at the moderate level of inclusion of sNSP. Increased inclusion of a phytate–rich source of dietary fibre caused mild reductions in nutrient digestibilities, firmer faeces and increased phosphorus digestibility. The results of these experiments suggest that the most effective use of exogenous feed enzymes appears to be in degrading moderate inclusions (16.3 g sNSP/kg DM) of soluble dietary fibre.

Publication Type: Journal Article
Murdoch Affiliation: School of Veterinary and Biomedical Sciences
Publisher: University of New England
URI: http://researchrepository.murdoch.edu.au/id/eprint/21273
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