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  • Title: Ileal, colonic and total tract nutrient digestibility in dogs (Canis familiaris) compared with total tract digestibility in mink (Neovison vison).
    Author: Tjernsbekk MT, Tauson AH, Ahlstrøm O.
    Journal: Arch Anim Nutr; 2014; 68(3):245-61. PubMed ID: 24870271.
    Abstract:
    Mink (Neovison vison) was studied as a model for the determination of ileal crude protein (CP) and amino acid (AA) digestibility in dogs (Canis familiaris). Apparent ileal digestibility (AID) and apparent colonic digestibility (ACD) in dogs and apparent total tract digestibility (ATTD) in dogs and mink were measured for dry matter (DM), main nutrients and AA. Standardised ileal digestibility (SID) of CP and AA in dogs was calculated. Twelve dogs and 12 mink divided into three groups were fed one out of three diets differing in CP digestibility. In dogs, AID of CP was lower (74.4%) than ATTD (83.5%) (p < 0.001). The ATTD of CP in mink (77.8%) did not differ from AID, ACD (78.5%) and SID (79.6%) in dogs. Digestibility of AA followed the same pattern, and, except for Thr and Ser, ATTD in mink was very close to SID in dogs. Also, AID was close to ATTD in mink for several AA. High correlations were found between methods for digestibility of CP and most AA (p < 0.01) and for AA ranking with respect to digestibility level (p < 0.001). In dogs, ether extract digestibility was approximately 96% at all sites, while DM, starch and total carbohydrate digestibility increased from ileal to faecal level (p < 0.01). Mink ATTD of DM and main nutrients was closest to ACD in dogs. It was concluded that mink is a suitable model for the determination of AID and SID of CP and AA in dogs.
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