Advertisement

On August 7, 2013

Comparison of nutrient digestibility of dry dog foods

Bioavailability estimates of AA may be less than those used to derive allowance estimates for dog foods.

This study compared the apparent total tract and ileal digestibility assays to measure AA absorption in commercial canine diets.

Five ileal cannulated dogs were fed five commercial dry canine foods selected to contain 19% to 30% CP in a 5 × 5 Latin square design. Ileal and total tract digestibility (apparent and standardized) of DM, OM, CP, crude fat (CF), carbohydrate and AA (including reactive Lys) were calculated using Cr2O3 as an indigestible marker. Greater apparent total tract digestibility values were found for DM, OM and CP compared with ileal digestibility values; however, CF had a greater ileal apparent digestibility.

Differences between sites in excess of 15 percentage units were recorded for AA. Apparent and standardized ileal reactive Lys digestibility was 3.1 to 15.3 percentage units greater than corresponding total tract digestibility values. For several indispensable AA, the bioavailability estimates currently used by the 2006 NRC and the 2011 Association of American Feed Control Officials to derive allowance estimates for canine adult maintenance were greater than the digestibility values of these AA in the commercial dog foods evaluated.

Although the canine large intestine is relatively short, the total tract digestibility assay in dogs can overestimate the digestibility of dietary AA and CP and may not be an accurate method for the measurement of absorption. In this study, bioavailability estimates of AA appeared to be less than those used to derive allowance estimates for commercial dog foods. Further work is required if current recommendations warrant adjustment.

Source:  W.H. Hendriks et al., 2013. Comparison of ileal and total tract nutrient digestibility of dry dog foods. J Anim Sci online August 2013. doi: 10.2527/jas.2012-5864

Comments powered by Disqus

Advertisement

Advertisement

Advertisement

Read the April issue of Petfood Industry!

April 2015

The April 2015 issue of Petfood Industry looks at different pet food markets around the world. Read about Sojos, a US company which aims to transform the lives of pets through raw pet food. As these specialized diets become increasingly popular in the dog and cat food markets, learn how such trends are carrying over into bird and small animal food. Plus, see how pet food companies in Russia are reacting and reconsidering production strategies in the wake of rising prices due to exchange rate fluctuations.

READ MORE in Petfood Industry magazine

Advertisement