Institute of Animal Nutrition, Vetsuisse Faculty, University of Zurich,Winterthurerstrasse 260, Zurich, Switzerland.
J Anim Physiol Anim Nutr (Berl). 2012 Dec;96(6):1003-11. doi: 10.1111/j.1439-0396.2011.01214.x. Epub 2011 Aug 22.
The NRC recommendations for cats for energy and protein supply during gestation and lactation are based on limited data. This study aimed to answer the question: Can the energy requirement be met with canned food or is the volume restrictive? Therefore, balance trials were conducted in 10 queens before mating, during the 4th and 7th week of gestation and during the 2nd and 6th week of lactation. The cats were fed with canned food ad libitum. Additionally, the body composition of the queens was measured by dual-energy X-ray absorptiometry (Dexa) before mating, after parturition and after weaning. Eight of 10 cats presented increased body fat content and lean body mass during gestation. The weight loss during lactation led to a loss of lean body mass, but only six cats lost body fat of widely differing amounts. It was evident that the queens' dry matter intake was consistent with that of queens fed ad libitum with dry food. The cats lost lean body mass during lactation and had negative protein balances in the 2nd week of lactation. This seems to be physiological in early lactation. Nevertheless, the protein recommendations for lactation seem to be too low.
NRC 关于猫在妊娠和哺乳期的能量和蛋白质供应的建议是基于有限的数据。本研究旨在回答以下问题：能否通过罐头食品满足能量需求，还是因为体积限制？因此，在交配前、妊娠第 4 周和第 7 周以及哺乳第 2 周和第 6 周，对 10 只母猫进行了平衡试验。这些猫可以自由采食罐头食品。此外，在交配前、分娩后和断奶后，通过双能 X 射线吸收法（Dexa）测量母猫的身体成分。在妊娠期间，8 只猫的体脂肪含量和去脂体重增加。哺乳期的体重减轻导致去脂体重减少，但只有 6 只猫的体脂肪减少量差异很大。显然，母猫的干物质摄入量与自由采食干粮的母猫一致。哺乳期的猫会失去去脂体重，并且在哺乳第 2 周出现蛋白质负平衡。这在早期哺乳期似乎是生理性的。然而，哺乳期的蛋白质推荐量似乎过低。
