title: Colonic permeability is higher in Great Danes compared with smaller breed-dogs.
abstract: Fed the same dry diet, large dogs show poorer fecal quality than small ones. A high colonic permeability could explain a low water and electrolyte net balance leading to high fecal water content. This experiment was conducted to evaluate colonic permeability in dogs varying in body size and to determine whether colonic permeability is related to fecal sodium concentration and fecal quality. Four breeds of dogs were used: six Miniature Poodles (MP), six Standard Schnauzers (SS), six Giant Schnauzers (GS) and six Great Danes (GD). Colonic permeability was evaluated using the ratio of urinary lactulose to sucralose (L:S) after oral administration. Fecal sodium concentration was measured by flame photometry. The urinary L:S ratio was significantly lower in GD, indicating a higher colonic permeability, than in the three other breeds (0.35 ± 0.12 for GD and 0.51 ± 0.05 for MP). GD also presented the higher fecal sodium concentrations and the poorest fecal quality. The higher fecal sodium concentration observed in GD could be explained by the higher colonic permeability and both these variables could be important explanations for higher fecal moisture in large dogs.
authors.affiliation: Unité de Nutrition et Endocrinologie, Ecole Nationale Vétérinaire de Nantes, BP 40706, 44307 Nantes cedex 3, France.
authors.forename: D C
authors.initials: DC
authors.lastname: Hernot
authors.forename: J
authors.initials: J
authors.lastname: Nery
authors.forename: V C
authors.initials: VC
authors.lastname: Biourge
authors.forename: L J
authors.initials: LJ
authors.lastname: Martin
authors.forename: H J
authors.initials: HJ
authors.lastname: Dumon
authors.forename: P G
authors.initials: PG
authors.lastname: Nguyen
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D049628:Body Size / Q000502:physiology*; D003106:Colon / Q000378:metabolism*; D004032:Diet / Q000662:veterinary; D004285:Dogs; D005243:Feces / Q000737:chemistry; D005260:Female; D007792:Lactulose / Q000652:urine; D010539:Permeability; D012964:Sodium / Q000737:chemistry; D013395:Sucrose / Q000031:analogs & derivatives / Q000652:urine; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D007792:Lactulose; D013395:Sucrose; C026285:trichlorosucrose; D012964:Sodium