Hernot D C, Biourge V C, Martin L J, Dumon H J, Nguyen P G
Nutrition and Endocrinology Unit, National Veterinary School of Nantes, 44307 Nantes, France.
J Anim Physiol Anim Nutr (Berl). 2005 Apr-Jun;89(3-6):189-93. doi: 10.1111/j.1439-0396.2005.00544.x.
Fed the same diet, large and giant-breed dogs have higher faecal moisture and increased frequency of soft stools than small ones. This could be the result of physiological differences, such as a different gastrointestinal transit time. In this study, we have correlated mean total transit time (MTT) with body size and faecal consistency in dogs varying in body size. Fifty dogs from 13 different breeds were used, from a Dachshund to a Great Dane. The MTT was determined using coloured plastic beads [Cummings and Wiggins, Gut, Vol. 17 (1976), p. 219], and faecal consistency was scored daily during the study. We confirmed the strong correlation between height at the shoulder (body size) and faecal score (r = 0.76; p < 0.0001). The MTT increased with body size, from 22 h for a Miniature Poodle to 59 h for a Giant Schnauzer. We found significant positive correlations (p < 0.0001) between MTT and body size as well as faecal scores (r = 0.71 and 0.70 respectively). In the present study, we observed an effect of body size on MTT. In our 50 healthy dogs a longer MTT was related to a poorer faecal quality. Previous studies reported no relationship between body size and the upper gastrointestinal transit time in healthy dogs. So, we hypothesized that body size would mainly affect colonic transit time and that a longer colonic residence time would be related to a poorer faecal quality by promoting fermentation activity.
食用相同的饮食时，大型犬和巨型犬的粪便含水量比小型犬更高，软便频率也更高。这可能是生理差异导致的，比如胃肠传输时间不同。在本研究中，我们将平均总传输时间（MTT）与不同体型犬的体型大小和粪便稠度进行了关联分析。使用了来自13个不同品种的50只狗，从腊肠犬到丹麦大狗。MTT通过彩色塑料珠进行测定[卡明斯和威金斯，《肠道》，第17卷（1976年），第219页]，在研究期间每天对粪便稠度进行评分。我们证实了肩高（体型大小）与粪便评分之间存在强相关性（r = 0.76；p < 0.0001）。MTT随体型大小增加，从迷你贵宾犬的22小时增加到巨型雪纳瑞的59小时。我们发现MTT与体型大小以及粪便评分之间存在显著正相关（p < 0.0001）（r分别为0.71和0.70）。在本研究中，我们观察到体型大小对MTT有影响。在我们的50只健康犬中，MTT较长与粪便质量较差有关。先前的研究报告称，健康犬的体型大小与上消化道传输时间之间没有关系。因此，我们假设体型大小主要影响结肠传输时间，并且较长的结肠停留时间会通过促进发酵活动而与较差的粪便质量相关。
