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Reducing post-mixing aggression and skin lesions in weaned pigs by application of a synthetic maternal pheromone

By J. H. Guy, S. E. Burns, J. M. Barker, S. A. Edwards

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In commercial pig production, piglets are often mixed after weaning which can result in severe aggression and lead to body damage, disruption of feeding behaviour and reduced growth. This experiment investigated whether application of a synthetic maternal pheromone to groups of weaned pigs in commercial housing would affect the level of aggression and skin lesions sustained after mixing. Two treatments (Pheromone and Control) were used with 16 replicate pens of pigs (20 pigs per pen). Treatments were applied on the day of weaning (average 28 days of age) on a per room basis in alternate weeks. In Pheromone pens, after routine washing and disinfection, the walls and feeders were treated one hour prior to occupation with a synthetic pheromone at a rate of 1.0 ml pig-1. Control pens were as for Pheromone except no product was applied. During the 24-h period, post mixing, pigs in pheromone-treated pens spent significantly less time fighting than those in control pens. This was reflected in reduced injury scores 24 h after mixing, with pigs in pheromone-treated pens having 39% fewer skin lesions on the front of the body compared to those in control pens. Treatment had no effect on growth rate or feed efficiency, although the feed intake for days 7-28 was significantly lower and feed efficiency tended to be lower in pheromone-treated pens. In conclusion, application of a synthetic maternal pheromone can be considered one of the arsenal of strategies to reduce aggression and safeguard the welfare of groups of weaned pigs where mixing is unavoidable.

Date 2009
Publication Title Animal Welfare
Volume 18
Issue 3
Pages 249-255
ISBN/ISSN 0962-7286
Language English
Author Address School of Agriculture Food and Rural Development, Newcastle University, Newcastle-upon-Tyne NE1 7RU, UK.
Cite this work

Researchers should cite this work as follows:

  1. Aggression
  2. Agriculture
  3. Animal behavior
  4. Animal diseases
  5. Animal genetics
  6. Animal housing
  7. Animal husbandry
  8. Animal nutrition
  9. Animal physiology
  10. Animal production
  11. Animal rights
  12. Animal welfare
  13. Feeders
  14. Feeding
  15. Feeding behavior
  16. Feed intake
  17. Growth rates
  18. Lesions
  19. Livestock farming
  20. Mammals
  21. Meat animals
  22. Occupations and Professions
  23. Parasites
  24. peer-reviewed
  25. pens
  26. performance traits
  27. Pesticides and Drugs
  28. pheromones
  29. pig farming
  30. skin
  31. Swine
  32. trauma
  33. weaning
  1. peer-reviewed