Friend T H, Knabe D A, Tanksley T D
J Anim Sci. 1983 Dec;57(6):1406-11. doi: 10.2527/jas1983.5761406x.
Crossbred pigs (384) used in three trials were assigned to one of three grouping treatments when moved to 1.4 X 1.6 m nursery pens 4 h postweaning at 28 d of age. Treatments included eight pigs from the same litter (8-1), four pigs from each of two different litters (4-2) and one pig from each of eight different litters (1-8). A commercial odor masking agent (OMA) commonly used to reduce tail biting and fighting was sprayed on one-half of the replicates of each treatment 20 min after (trial 1) or immediately before (trials 2 and 3) the pigs were moved to the nursery. Agonistic behavior was quantified (trials 2 and 3) by direct observation for the first 3 h and again for 2 h at 24 and 48 h post-grouping. Application of OMA 20 min post-mixing caused only a temporary (3 to 5 min) cessation of fighting. A slight increase in fighting in all three grouping treatments was observed when OMA was applied before mixing. Average daily gain for 0 to 4 and 0 to 28 d and feed intake for 0 to 7 and 0 to 28 d were not influenced by OMA or grouping treatments. Combining alien pigs resulted in a significant increase in fighting but did not affect long term performance.
在三项试验中使用的384头杂交猪在28日龄断奶后4小时被转移到1.4×1.6米的保育栏时，被分配到三种分组处理之一。处理包括来自同一窝的8头猪（8-1）、来自两个不同窝的每组4头猪（4-2）以及来自八个不同窝的每组1头猪（1-8）。一种常用于减少咬尾和打斗的商业气味掩盖剂（OMA）在猪转移到保育栏后20分钟（试验1）或就在转移前（试验2和3）喷洒在每种处理的一半重复栏中。通过在分组后的前3小时直接观察以及在分组后24小时和48小时再次观察2小时来量化攻击行为（试验2和3）。混合后20分钟施用OMA仅导致打斗暂时停止（3至5分钟）。在混合前施用OMA时，观察到所有三种分组处理中的打斗略有增加。OMA或分组处理对0至4天和0至28天的平均日增重以及0至7天和0至28天的采食量没有影响。将陌生猪组合在一起导致打斗显著增加，但不影响长期性能。
