Dietary fibre type influences protein and fat digestibility in dogs

Marx, Fábio Ritter; Machado, Gilmara de Oliveira; Kessler, Alexandre de Mello; Trevizan, Luciano

doi:10.1080/1828051x.2022.2119437

Cited by 1 publication

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“…The negative correlation between NDF contents and IVID of DM observed in this study indicates that nutrient utilization in dog diets decreases with increasing fiber contents. The present results are in agreement with those in previous studies which reported the negative effects of fiber on energy and nutrient digestibility in dogs [ 24 , 37 , 38 , 39 ]. Fibers are less digestible than starch, protein, and fat due to the lack of fiber-degrading enzymes secreted in the stomach and the small intestine of dogs, although microbes in the large intestine may partially digest dietary fiber [ 40 , 41 , 42 ].…”

Section: Discussionsupporting

confidence: 94%

Prediction Equations for In Vitro Ileal Disappearance of Dry Matter and Crude Protein Based on Chemical Composition in Dog Diets

Song

Kim

2023

Animals

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The aims of this study were to determine in vitro ileal disappearance (IVID) of dry matter (DM) and crude protein (CP) in commercial dog diets and to develop equations for predicting the IVID of DM and CP in dog diets based on chemical composition. Eighteen commercial dog diets were analyzed for IVID of DM and CP using a two-step in vitro procedure for dogs. The diet samples in flasks with digestive enzymes were incubated for 2 h and 4 h to simulate digestion in the stomach and the small intestine, respectively. The contents of CP, ether extract, neutral detergent fiber (NDF), and ash in the diets ranged from 14.4 to 42.5%, 3.5 to 23.5%, 6.4 to 34.6%, and 4.9 to 10.0%, respectively, on an as-is basis. The NDF contents were negatively correlated with the IVID of DM and CP (r = −0.73 and r = −0.62, respectively; p < 0.05). The most suitable prediction equations for the IVID of DM and CP in the dog diets were: IVID of DM (%) = 81.33 + 0.46 × CP − 0.77 × NDF, R2 = 0.78; IVID of CP (%) = 81.25 + 0.33 × CP − 0.49 × NDF, R2 = 0.64, where all nutrients were in % on an as-is basis. In conclusion, dry matter and protein utilization of dog diets based on in vitro digestibility assays can be estimated fairly well using protein and fiber concentrations as independent variables.

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