Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

  • Print ISSN 0367-6722

  • Online ISSN 0976-0555

  • NAAS Rating 6.50

  • SJR 0.263

  • Impact Factor 0.5 (2023)

Frequency :
Monthly (January, February, March, April, May, June, July, August, September, October, November and December)
Indexing Services :
Science Citation Index Expanded, BIOSIS Preview, ISI Citation Index, Biological Abstracts, Scopus, AGRICOLA, Google Scholar, CrossRef, CAB Abstracting Journals, Chemical Abstracts, Indian Science Abstracts, EBSCO Indexing Services, Index Copernicus
Indian Journal of Animal Research, volume 52 issue 5 (may 2018) : 768-773

Effects of former acquaintance on aggression, lesion and growth performance in weaned piglets after mixing

Hongyuan Mei, Ling Gan
1<p>Department of Veterinary Medicine, Rongchang Campus,&nbsp;Southwest University, 402460 Chongqing, P.R. China</p>
Cite article:- Mei Hongyuan, Gan Ling (2017). Effects of former acquaintance on aggression, lesion and growth performance in weaned piglets after mixing . Indian Journal of Animal Research. 52(5): 768-773. doi: 10.18805/ijar.v0iOF.9118.

Excessive aggression between weaned piglets after mixing is a welfare and production issue resulting in stress, injuries and economic losses. The aim of this study is to determine the effect of former acquaintance (FA) on aggression, lesion and growth performance in weaned, mixed piglets. The results showed that the FA group significantly reduced the number of fights, time spent fighting, number of bullying events, lesions, the average injury scores of the front site and middle site of weaned piglets after mixing. A significant interaction was found between the effects of sex and treatment on the number of fights won and bullying events, between the effects of days post-weaning and treatment on the lesion scores as well as between the effect of the lesion sites and treatments on the lesion score for all three days after mixing. The results suggested a potential welfare advantage to allow litters to have some acquaintance before weaning.


  1. Arey, D.S., Franklin, M.F. (1995). Effects of straw and unfamiliarity on fighting between newly mixed growing pigs. Appl Anim Behav Sci. 45: 23–30. 

  2. Barnett, J.L., Cronin, G.M., McCallum, T.H., Newman, E.A. (1994). Effects of food and time of day on aggression when grouping unfamiliar adult pigs. Appl Anim Behav Sci. 39: 339–347.

  3. Chaloupková, H., Illmann, G., Bartos, L., Spinka, M. (2007). The effect of pre-weaning housing on the play and agonistic behaviour of domestic pigs. Appl Anim Behav Sci. 103: 25–34. 

  4. Colson, V., Orgeur, P., Courboulay, V., Dantec, S., Foury, A., Mormède, P. (2006). Grouping piglets by sex at weaning reduces aggressive behavior. Appl Anim Behav Sci. 97: 152-171. 

  5. D’Eath, R.B. (2002). Individual aggressiveness measured in a resident-intruder test predicts the persistence of aggressive behaviour and weight gain of young pigs after mixing. Appl Anim Behav Sci. 77: 267–283. 

  6. Erhard, H.W., Mendl, M., Ashley, D.D. (1997). Individual aggressiveness of pigs can be measured and used to reduce aggression after mixing. Appl Anim Behav Sci. 54: 137–151. 

  7. Fraser, D. (1974). The behaviour of growing pigs during experimental social encounters. J Agr Sci. 82: 147–163. 

  8. Horrell, I., Hodgson, J. (1992). The bases of sow-piglet identification. 1. The identification by sows of their own piglets and the presence of intruders. Appl Anim Behav Sci. 33: 319-327. 

  9. Jensen, P., Yngvesson, J. (1998). Aggression between unacquainted pigs—sequential assessment and effects of familiarity and weight. Appl Anim Behav Sci . 58: 49–61. 

  10. Meese, G.B., Ewbank, R. (1973). The establishment and nature of the dominance hierarchy in the domesticated pig. Anim Behav. 21: 326–334. 

  11. Mei, H., Yang, B., Luo, J., Gan, L. (2016). The effect of mixing levels on aggression at weaning in piglets. Appl Anim Behav Sci. 179: 32-38. 

  12. Melotti, L., Oostindjer, M., Bolhuis, J.E., Held, S., Mendl, M. (2011). Coping personality type and environmental enrichment affect aggression at weaning in pigs. Appl Anim Behav Sci. 133: 144–153.   

  13. Petersen, H.V., Vestergaard, K., Jensen, P. (1989). Integration of piglets into social groups of free-ranging domestic pigs. Appl Anim Behav Sci. 23: 223-236. 

  14. Pluske, J.R., Hampson, D.J., Williams, I.H. (1997). Factors influencing the structure and function of the small intestine in the weaned  pig: a review. Livest Prod Sci. 51: 215–236. 

  15. Rundgren, M., Löfquist, I. (1989). Effect on performance and behaviour of mixing 20-kg pigs fed individually. Anim Prod 49: 311–315. 

  16. Tan, S.S.L., Shackleton, D.M. (1990). Effects of mixing unfamiliar individuals and of azaperone on the social behaviour of finishing pigs. Appl Anim Behav Sci. 26: 157–168. 

  17. Val-Laillet, D., Tallet, C., Gurin, C., Meunier-Salan, M. (2013). Behavioural reactivity, social  and cognitive abilities of Vietnamese and Pitman-Moore weaned pigs. Appl. Anim. Behav Sci 148:  108–119.  

  18. Weary, D.M., Pajor, E.A., Bonenfant, M., Fraser, D., Kramer, D.L. (2002). Alternative housing for sows and litters: Part 4. Effects of sow-controlled housing combined with a communal piglet area on pre- and post-weaning behaviour and performance. Appl         Anim Behav Sci. 76: 279–290.  

Editorial Board

View all (0)