Kent J E, Molony V, Robertson I S
Department of Preclinical Veterinary Sciences, School of Veterinary Studies, Edinburgh University, Summerhall.
Vet Rec. 1995 Feb 25;136(8):192-6. doi: 10.1136/vr.136.8.192.
The behavioural and plasma cortisol changes in groups of six lambs, five to six days old, were used to compare the acute effects of four methods of castration and tail docking: Burdizzo, standard sized and small rubber rings, and a combined method in which the application of a standard rubber ring was followed immediately by the application of the Burdizzo just distal to it. A control group was also included. Active behaviours such as foot stamping and restlessness increased markedly only after the treatments with rubber rings. Less time was spent in abnormal postures, and the increases in plasma cortisol were least after the combined method. It was concluded that the lambs treated by all the methods suffered considerable acute pain, for up to three hours in some cases, but that the combined method produced the least pain as judged by the behavioural and physiological indices measured, and that the small rubber rings produced more intense pain for a shorter time than the standard rubber rings.
对六组5至6日龄羔羊的行为和血浆皮质醇变化进行了研究，以比较四种去势和断尾方法的急性效应：使用布尔迪佐钳、标准尺寸和小尺寸橡胶圈，以及一种联合方法，即先套上标准橡胶圈，紧接着在其远端使用布尔迪佐钳。同时设立了一个对照组。只有在使用橡胶圈处理后，诸如跺脚和躁动不安等主动行为才会显著增加。羔羊处于异常姿势的时间减少，且联合方法处理后血浆皮质醇的升高幅度最小。研究得出结论，所有处理方法的羔羊都遭受了相当程度的急性疼痛，在某些情况下长达三小时，但从所测量的行为和生理指标判断，联合方法产生的疼痛最小，并且小橡胶圈在较短时间内产生的疼痛比标准橡胶圈更强烈。
