The impact of protein source and grain inclusion on digestibility, fecal metabolites, and fecal microbiome in adult canines.

Autor:	Clark SD; BSM Partners, Bentonville, AR 72712, USA., Hsu C; Department of Animal Sciences, The University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA., McCauley SR; BSM Partners, Bentonville, AR 72712, USA., de Godoy MRC; Department of Animal Sciences, The University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA., He F; Department of Animal Sciences, The University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA., Streeter RM; BSM Partners, Bentonville, AR 72712, USA., Taylor EG; BSM Partners, Bentonville, AR 72712, USA., Quest BW; BSM Partners, Bentonville, AR 72712, USA.
Jazyk:	angličtina
Zdroj:	Journal of animal science [J Anim Sci] 2023 Jan 03; Vol. 101.
DOI:	10.1093/jas/skad268
Abstrakt:	This study was conducted to determine the effect of animal protein inclusion rate and grain-free or grain-inclusive diets on macronutrient digestibility, fecal characteristics, metabolites, and microbiota in mixed-breed hounds and Beagles. Four experimental extruded kibble diets were made with varying amounts of animal protein and carbohydrates: 1) high animal protein, grain-inclusive (HA-GI), 2) low animal protein, grain-free (LA-GF), 3) low animal protein, grain-inclusive (LA-GI), and 4) high animal protein, grain-free (HA-GF). Thirty-two Beagles and 33 mixed-breed hounds were assigned to 1 of the 4 treatment groups in a completely randomized design that lasted 180 d. All diets were similar in chemical composition and well-digested by the animals. In general, for fecal metabolites, mixed-breed hounds had a greater concentration of total short-chain fatty acid (SCFA) and ammonia and lower indole concentration than Beagles (P < 0.05). In mixed-breed hounds, LA-GF had a greater (P < 0.05) total SCFA concentration than HA-GI and LA-GI; however, this was not observed in Beagles. There were greater concentrations of ammonia, phenol, and indole in HA-GI than in LA-GF (P < 0.05). Breed-affected fecal primary bile acid (BA) concentration, as mixed-breed hounds had a greater concentration of cholic acid (CA) than Beagles (P < 0.05). Mixed-breed hounds fed LA-GF resulted in greater CA concentrations than HA-GI and LA-GI (P < 0.05). Dogs who consumed LA-GF had lower fecal secondary BA content than the other groups (P < 0.05). The distribution of the fecal microbiota community differed in LA-GF compared with the other groups, with lower α-diversity. However, dogs fed LA-GF had the largest difference in composition with greater Selenomonadaceae, Veillonellaceae, Lactobacillaceae, Streptococcus, Ligilactobacillus, Megamonas, Collinsella aerofaciens, and Bifidobacterium sp. than the other groups. A significant breed effect was noted on nutrient digestibility, fecal metabolites, and microbiota. A treatment effect was observed in LA-GF as it resulted in greater fecal SCFA, lower protein fermentative end products, greater fecal primary BAs, lower fecal secondary BA concentrations, and shifts in fecal microbiota. (© The Author(s) 2023. Published by Oxford University Press on behalf of the American Society of Animal Science.)
Databáze:	MEDLINE
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