Mills D S, Nicol C J
Department of Animal Husbandry, University of Bristol, Langford.
Vet Rec. 1990 Mar 3;126(9):210-2. doi: 10.1136/vr.126.9.210.
Tonic immobility tests were used to obtain information about the levels of fear in end-of-lay hens after they had been transported to four commercial processing plants. They stayed in a condition of tonic immobility longer than hens which had only been caught and removed from cages. There was no evidence that they became habituated to transport during journeys of up to five hours, but there were significant differences between the levels of fear expressed by birds transported by the different processors.
强直静止试验被用于获取关于产蛋末期母鸡在被运输到四个商业加工厂后恐惧水平的信息。与仅被抓出笼子的母鸡相比，它们处于强直静止状态的时间更长。没有证据表明它们在长达五小时的运输过程中会习惯运输，但不同加工厂运输的鸡所表现出的恐惧水平存在显著差异。
