Effect of toys on behaviour and body weight of weaned pigs after mixing


Hwang H.S., Lee J.K., Eom T.K., Lee D.H., Rhim S.J. (2021): Effect of toys on behaviour and body weight of weaned pigs after mixing. Czech J. Anim. Sci., 66: 323 – 330.

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This study was conducted to evaluate the effects of a toy on the behaviour and body weight of weaned pigs after mixing. Two groups (192 pigs in total, control: without toy; treatment: with toy placed on the floor) of weaned pigs housed in pens (1.8 m × 1.4 m, 4 pigs/pen) were This study was conducted to evaluate the effects of a toy on the behaviour and body weight of weaned pigs after mixing. Two were observed with the aid of video technology for nine consecutive hours in the early (days 1 and 2) and late (days 38 and 39) period after mixing. Bodyweight of pigs at the end of the study (Mann-Whitney U-test, Z = –2.46, = 0.01) and the average daily gain (= –2.75, < 0.01) were 10% higher in the treatment group than in the control group. The presence of the toy in the pen influenced the pig behaviours. In pens enriched with toys, there was an increase in feeding behaviour and a decrease in agonistic and belly nosing behaviours. Toy supply reduced negative social behaviours and thereby improved the bodyweight of weaned pigs. The results of this study suggest that toys used as environmental enrichment are useful for enhancing pig welfare and effective for farmers.


Beattie VE, O’Connell NE, Moss BW. Influence of environmental enrichment on the behaviour, performance and meat quality of domestic pigs. Livest Prod Sci. 2000 Jul 1;65(1-2):71-9. https://doi.org/10.1016/S0301-6226(99)00179-7
Benson GJ, Rollin BE. The well-being of farm animals: Challenges and solutions. 1st ed. Ames, USA: Blackwell Publishing; 2004. 378 p.
Bolhuis JE, Schouten WGP, Schrama JW, Wiegant VM. Effects of rearing and housing environment on behaviour and performance of pigs with different coping characteristics. Appl Anim Behav Sci. 2006 Dec 1;101(1-2):68-85.  https://doi.org/10.1016/j.applanim.2006.01.001
D’Eath RB. 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. 2002 Jun 28;77(4):267-83. https://doi.org/10.1016/S0168-1591(02)00077-1
Docking CM, Van de Weerd H, Day JEL, Edwards SA. The influence of age on the use of potential enrichment objects synchronization of behavior of pigs. Appl Anim Behav Sci. 2008 Apr 1;110(3-4):244-57.  https://doi.org/10.1016/j.applanim.2007.05.004
Dudink S, Simonse H, Marks I, de Jonge H, Spruijt BM. Announcing the arrival of enrichment increases play behavior and reduces weaning-stress-induced behaviours of piglets directly after weaning. Appl Anim Behav Sci. 2006 Dec 1;101(1-2):86-101.  https://doi.org/10.1016/j.applanim.2005.12.008
Ernst K, Ekkelboom M, Kerssen N, Smeets S, Sun Y, Yin X. Play behavior and environmental enrichment in pigs: Concretizing principle-based regulation Article 2.22, paragraph 1 from The Animal Keepers Decree to improve pig welfare. Wageningen, The Netherlands: Wageningen University & Research; 2018 Jun 29. 59 p.
Faucitano L, Schaefer AL. Welfare of pigs: From birth to slaughter. Wageningen, The Netherlands: Wageningen Academic Publishers; 2008. 316 p.
Fraser D, Phillips PA, Thompson BK, Tennessen T. Effects of straw on the behaviour of growing pigs. Appl Anim Behav Sci. 1991 May 1;30(3-4):307-18. https://doi.org/10.1016/0168-1591(91)90135-K
Godyn D, Nowicki J, Herbut P. Effects of environmental enrichment on pig weflare–a review. Animals. 2019 Jun;9(6): 17 p. https://doi.org/10.3390/ani9060383
Gracner GG, Semiga N, Ostovic M, Kabalin AE, Matkovic K, Pavicic Z. The effect of environmental enrichment objects on weight gain in weaned pigs. Vet Arhiv. 2013 May;83(3):333-9.
Hayne SM, Gonyou HW. Behavioural uniformity or diversity? Effects on behavior and performance following regrouping in pigs. Appl Anim Behav Sci. 2006 Jun 1;98(1-2):28-44.  https://doi.org/10.1016/j.applanim.2005.08.007
Hwang HS, Lee JK, Eom TK, Son SH, Hong JK, Kim KH, Rhim SJ. Behavioral characteristics of weaned piglets mixed in different groups. Asian-Australas J Anim Sci. 2016 Jul;29(7):1060-4. https://doi.org/10.5713/ajas.15.0734
Ismayilova G, Costa A, Fontana I, Berckmans D, Guarino M. Labelling the behaviour of piglets and activity monitoring from video as a tool of assessing interest in different environmental enrichments. Ann Anim Sci. 2013 Jul 1;13(3):611-21. https://doi.org/10.2478/aoas-2013-0037
Keeling LJ, Gonyou HW. Social behaviour in farm animals. Oxon, UK: CAB International; 2001. 432 p.
Kelly HRC, Bruce JM, English PR, Fowler VR, Edwards SA. Behaviour of 3-week weaned pigs in Straw-Flow®, deep straw and flat deck housing systems. Appl Anim Behav Sci. 2000 Jul 1;68(4):269-80.  https://doi.org/10.1016/S0168-1591(00)00109-X
Li Y, Wang L. Effects of previous housing system on agonistic behaviors of growing pigs at mixing. Appl Anim Behav Sci. 2011 Jun 1;132(1-2):20-6. https://doi.org/10.1016/j.applanim.2011.03.009
Melotti L, Oostindjer M, Bolhuis JE, Held S, Mendl M. Coping personality type and environmental enrichment affect aggression at weaning in pigs. Appl Anim Behav Sci. 2011 Sep 1;133(3-4):144-53.  https://doi.org/10.1016/j.applanim.2011.05.018
Merlot E, Meunier-Salaun MC, Prunier A. Behavioural, endocrine and immune consequences of mixing in weaning piglets. Appl Anim Behav Sci. 2004 Mar 25;85(3-4):247-57. https://doi.org/10.1016/j.applanim.2003.11.002
Moinard C, Mendl M, Nicol CJ, Green LE. A case control study of on-farm risk factors for tail biting in pigs. Appl Anim Behav Sci. 2003 May 21;81(4):333-55.  https://doi.org/10.1016/S0168-1591(02)00276-9
Moncek F, Dunck R, Johansson BB. Effect of environmental enrichment on stress related systems in rats. J Nueroendocrinol. 2004 May;16(5):423-31.  https://doi.org/10.1111/j.1365-2826.2004.01173.x
Nannoni E, Sardi L, Vitali M, Trevisi E, Ferrari A, Barone F, Bacci ML, Barbieri S, Martelli G. Effects of different enrichment devices on some welfare indicators of post-weaned undocked piglets. Appl Anim Behav Sci. 2016 Nov 1;184:25-34. https://doi.org/10.1016/j.applanim.2016.08.004
Newberry RC. Environmental enrichment: Increasing the biological relevance of captive environments. Appl Anim Behav Sci. 1995 Sep 1;44(2-4):229-43.  https://doi.org/10.1016/0168-1591(95)00616-Z
Nowicki J, Klocek C. The effect of aromatized environmental enrichment in pen on social relations and behavioural profile of newly mixed weaner. Ann Anim Sci. 2012 Jul 1;12(3):403-12.  https://doi.org/10.2478/v10220-012-0034-2
Nowicki J, Kopyra M, Klocek C. The behavioural reaction of weaners to hang toys: Wooden ball and aromatized wooden ball – way to reduce aggression after mixing. J Cent Eur Agric. 2007 Dec 27;8(4):447-52.
Nowicki J, Swierkosz S, Tuz R, Schwarz T. The influence of aromatized environmental enrichment objects with changeable aromas on the behaviour of weaned piglets. Vet Arhiv. 2015 Sep 2;85(4):425-35.
Oliveira RF, Soares RTRN, Molino JP, Costa RL, Bonaparte TP, Silva ET Jr, Pizzutto CS, Santos IP. Environmental enrichment improves the performance and behavior of piglets in the nursery phase. Arq Bras Med Vet Zootec. 2016 Mar;68(2):415-21. https://doi.org/10.1590/1678-4162-8253
Petersen V, Simonsen HB, Lawson LG. The effect of environmental stimulation on the development of behaviour in pigs. Appl Anim Behav Sci. 1995 Nov 1;45(3-4):215-24.  https://doi.org/10.1016/0168-1591(95)00631-2
Rhim SJ. Effects of group size on agonistic behaviors of commercially housed growing pigs. Rev Colomb Cienc Pecu. 2012 Sep;25(3):353-9.
Rhim SJ, Son SH, Hwang HS, Lee JK, Hong JK. Effects of mixing on the aggressive behavior of commercially housed pigs. Asian-Australas J Anim Sci. 2015 Jul;28(7):1038-43.  https://doi.org/10.5713/ajas.14.0907
Torralladona D, Roura E. Voluntary feed intake in pigs. Wageningen, The Netherlands: Wageningen Academic Publishers; 2009. 368 p.
Trickett SL, Guy JH, Edwards SA. The role of novelty in environmental enrichment for the weaned pig. Appl Anim Behav Sci. 2009 Jan 15;116(1):45-51.  https://doi.org/10.1016/j.applanim.2008.07.007
Turner SP, Roehe R, D’Eath RB, Ison SH, Farish M, Jack MC, Lundeheim N, Rydhmer L, Lawrence AB. Genetic validation of postmixing skin injuries in pigs as an indicator of aggressiveness and the relationship with injuries under more stable conditions. J Anim Sci. 2009 Oct 1; https://doi.org/10.2527/jas.2008-1558
Van de Weerd HA, Docking CM, Day JEL, Avery PJ, Edwards SA. A systematic approach towards developing environmental enrichment for pigs. Appl Anim Behav Sci. 2003 Nov 25;84(2):101-18.  https://doi.org/10.1016/S0168-1591(03)00150-3
Van de Weerd HA, Docking CM, Day JEL, Edwards SA. The development of harmful social behaviour in pigs with intact tails and different enrichment backgrounds in two housing systems. Anim Sci. 2005 Jun;80(3):289-98. https://doi.org/10.1079/ASC40450289
Verdon M, Morrison RS, Hemsworth PH. Rearing piglets in multi-litter group lactation systems: Effects on piglet aggression and injuries post-weaning. Appl Anim Behav Sci. 2016 Oct 1;183:35-41. https://doi.org/10.1016/j.applanim.2016.05.008
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