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Evidence of Pain, Stress, and Fear of Humans During Tail Docking and the Next Four Weeks in Piglets (Sus scrofa domesticus)

By Céline Tallet, Marine Rakotomahandry, Sabine Herlemont, Armelle Prunier

Category Journal Articles

Tail docking is widely performed in pig farms to prevent tail biting. We investigated the
consequences of this practice on behavioral indicators of pain and stress, and on the
human-piglet relationship during lactation.Within 19 litters, piglets (1–3 days of age) were
submitted on day 0 (D0) to docking with a cautery iron (D), sham-docking (S), or no
docking (U). Piglets from the D and S groups were observed during the procedure (body
movements and vocalizations) and just after, in isolation, during 20 s for body, tail and
ear postures as well as ear movements. Piglets from the three treatments were observed
in their home pen after docking on D0 and D3 afternoon for body posture, tail posture
and movements. Piglets from the D and U groups were observed on D6, D12, D19, and
D26 in their home pen for oral behavior, body, and tail posture. Tail damage and tear
staining were scored on D5, D11, D18, and D25. A 5-min motionless human test was
performed on D14. During the procedure, D piglets screamed more and with a higher
intensity (P < 0.05) than S piglets (n = 48–50). Just after docking, D piglets held their
ears in a posture perpendicular to the head-tail axis and changed their ear posture more
often (P < 0.05). Between D6 and D26, D piglets kept their tail immobile (P < 0.001)
and in a horizontal position (P < 0.01) more often than U piglets (n = 45–47). Between
D11 and D25, U piglets had higher scores for tail damage and damage freshness than
D piglets (0.09 < P < 0.02) whereas tear-stain score was similar. In the human test, D
piglets interacted later with an unfamiliar human than U piglets (P = 0.01, n = 18/group).
Present data indicate signs of acute pain and stress in piglets due to docking during the
procedure itself and adverse consequences throughout lactation thereafter, including on
their relationship with humans. On the other hand, the presence of tail lesions shows that
undocked piglets are subject to more tail biting, even before weaning.


Marcy Wilhelm-South

Purdue University

Date 2019
Publication Title Frontiers in Veterinary Science
Volume 6
Pages 11
DOI 10.3389/fvets.2019.00462
Language English
Additional Language English
Cite this work

Researchers should cite this work as follows:

  1. Animal roles
  2. Animal welfare
  3. Ear
  4. Gestures
  5. open access
  6. Posture
  7. tails
  8. vocalizations
  1. open access