Alexander Janet E, Colyer Alison, Morris Penelope J
WALTHAM Centre for Pet Nutrition, Waltham-on-the-Wolds, Melton Mowbray LE14 4RT, UK.
J Nutr Sci. 2017 Aug 29;6:e42. doi: 10.1017/jns.2017.43. eCollection 2017.
Approximately 40 % of pet dogs are estimated to be overweight and this is associated with health conditions significantly reducing life span and quality. In cats, dietary energy dilution has been reported to increase activity levels and aid healthy body-weight maintenance. Our aim was to investigate this in dogs. For 28 d, a complete and balanced standard dry diet, hydrated to a total moisture content (TMC) of 72 %, was offered to forty-six dogs at individual maintenance energy requirements (MER). Intake, body weight and activity were measured. For the following 28 d, the dry diet was offered at 200 % of MER with or without hydration (7·6 or 72 % TMC) and measurements repeated. When offered diets in excess, body weight increased significantly faster (19·3 g/d) with the hydrated diet ( = 0·001), but activity levels did not change from baseline ( = 0·392), while activity reduced significantly with the dry diet (about 15 %; < 0·001). Dogs completely compensated for the reduction of dietary energy content, indicating that this is not a useful strategy for maintaining body weight when offered excess food.
据估计，约40%的宠物狗超重，这与显著缩短寿命和降低生活质量的健康状况相关。在猫身上，据报道饮食能量稀释可提高活动水平并有助于维持健康体重。我们的目的是在狗身上研究这一点。在28天的时间里，按照每只狗的个体维持能量需求（MER），为46只狗提供一种完全均衡的标准干狗粮，使其水合后的总水分含量（TMC）达到72%。测量摄入量、体重和活动量。在接下来的28天里，以MER的200%提供干狗粮，分为加水合（72% TMC）和不加水合（7.6% TMC）两种情况，并重复进行测量。当提供过量饮食时，加水合的饮食使体重显著增加得更快（19.3克/天）（P = 0.001），但活动水平与基线相比没有变化（P = 0.392），而干狗粮则使活动量显著降低（约15%；P < 0.001）。狗完全补偿了饮食能量含量的减少，这表明当提供过量食物时，这不是维持体重的有效策略。
