Schauf Sofia, Stockman Jonathan, Haydock Richard, Eyre Ryan, Fortener Lisa, Park Jean Soon, Bakke Anne Marie, Watson Phillip
WALTHAM Petcare Science Institute, Waltham on the Wolds, Leicestershire LE14 4RT, UK.
Royal Canin Pet Health Nutrition Center, Lewisburg, OH 45338, USA.
Animals (Basel). 2021 Jul 17;11(7):2127. doi: 10.3390/ani11072127.
Age-related changes in gastrointestinal function have been reported in companion animals, but the impact on digestive efficiency remains uncertain. Healthy dogs ( = 37; 2.6-14.2 years) received four diets varying in total dietary fibre (TDF; 6-29%, as fed). Healthy cats ( = 28; 1-13 years) received four diets with two fat (10-12%; 17-18%) and TDF (9 and 12%) levels. In a crossover design, diets were provided over four consecutive 10-day cycles, including a 4-day faecal collection. Apparent crude protein (CP), ether extract (EE), TDF, calcium (Ca), and phosphorus (P) digestibilities were determined. The effect of age was analysed as a continuous variable in dogs and as differences between adult (1-5 years) and senior (7-13 years) cats. In dogs, EE digestibility was unaffected by age ( > 0.10). Dogs of 6-12 years had higher digestibility of CP ( = 0.032), TDF ( = 0.019), Ca ( = 0.019), and P ( = 0.024) when fed the 6% TDF diet. Senior cats had greater digestibility of TDF ( < 0.01) and Ca ( = 0.024) but had lower EE and CP digestibility with one diet (17% fat; 9%TDF) (age, > 0.10; diet × age, < 0.001). Healthy ageing was associated with preserved nutrient digestibility in dogs and cats within the age ranges studied. The effect of ingredient sources in senior cats warrants further investigation.
伴侣动物胃肠道功能的年龄相关变化已有报道，但对消化效率的影响仍不确定。健康犬（n = 37；2.6 - 14.2岁）摄入四种膳食纤维总量（TDF；6 - 29%，按喂食量计）不同的日粮。健康猫（n = 28；1 - 13岁）摄入四种脂肪（10 - 12%；17 - 18%）和TDF（9%和12%）水平的日粮。采用交叉设计，连续四个10天周期提供日粮，包括4天的粪便收集期。测定表观粗蛋白（CP）、乙醚提取物（EE）、TDF、钙（Ca）和磷（P）的消化率。在犬中，将年龄作为连续变量进行分析，在猫中分析成年猫（1 - 5岁）和老年猫（7 - 13岁）之间的差异。在犬中，EE消化率不受年龄影响（P > 0.10）。6 - 12岁的犬在喂食6% TDF日粮时，CP（P = 0.032）、TDF（P = 0.019）、Ca（P = 0.019）和P（P = 0.024）的消化率更高。老年猫的TDF（P < 0.01）和Ca（P = 0.024）消化率更高，但在一种日粮（17%脂肪；9% TDF）下EE和CP消化率较低（年龄，P > 0.10；日粮×年龄，P < 0.001）。在所研究的年龄范围内，健康老龄化与犬猫营养物质消化率的保持有关。老年猫中成分来源的影响值得进一步研究。
