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Effects of tail docking and docking length on neuroanatomical changes in healed tail tips of pigs

  • M. S. Herskin (a1), K. Thodberg (a1) and H. E. Jensen (a2)


In pig production, piglets are tail docked at birth in order to prevent tail biting later in life. In order to examine the effects of tail docking and docking length on the formation of neuromas, we used 65 pigs and the following four treatments: intact tails (n=18); leaving 75% (n=17); leaving 50% (n=19); or leaving 25% (n=11) of the tail length on the pigs. The piglets were docked between day 2 and 4 after birth using a gas-heated apparatus, and were kept under conventional conditions until slaughter at 22 weeks of age, where tails were removed and examined macroscopically and histologically. The tail lengths and diameters differed at slaughter (lengths: 30.6±0.6; 24.9±0.4; 19.8±0.6; 8.7±0.6 cm; P<0.001; tail diameter: 0.5±0.03; 0.8±0.02; 1.0±0.03; 1.4±0.04 cm; P<0.001, respectively). Docking resulted in a higher proportion of tails with neuromas (64 v. 0%; P<0.001), number of neuromas per tail (1.0±0.2 v. 0; P<0.001) and size of neuromas (1023±592 v. 0 μm; P<0.001). The results show that tail docking piglets using hot-iron cautery causes formation of neuromas in the outermost part of the tail tip. The presence of neuromas might lead to altered nociceptive thresholds, which need to be confirmed in future studies.


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Anonymous 2003. Regulation No 324 on tail docking and castration of animals. Danish Ministry of Food, Agriculture & Fisheries, Copenhagen, 6 May.
Breward, J and Gentle, MJ 1985. Neuroma formation and abnormal afferent nerve discharges after partial beak amputation (beak trimming) in poultry. Experientia 41, 11321134.
Burnett, MG and Zager, EL 2004. Pathophysiology of peripheral nerve injury: a brief review. Neurosurgical Focus 16, E1.
Dahl-Pedersen, K, Bonde, MK, Herskin, MS, Jensen, KH, Kaiser, M and Jensen, HE 2013. Pathogenesis and pathology of shoulder ulcerations in sows with special reference to peripheral nerves and behavioural responses to palpation. The Veterinary Journal 198, 666671.
Devor, M 2013. Neuropathic pain: pathophysiological response of nerves to injury. In Textbook of pain (ed. SB McMahon et al.), pp. 861888. Elsevier Saunders, Philadelphia.
Devor, M and Seltzer, Z 1999. Pathophysiology of damaged nerves in relation to chronic pain. In Textbook of pain (ed. PD Wall and R Melzack), pp. 129144. Churchill Livingstone, Edinburgh, UK.
Devor, M, Wall, PD and Catalan, N 1992. Systemic lidocain silences ectopic neuroma and DRG discharge without blocking nerve conduction. Pain 48, 261268.
Dorsi, MJ, Chen, L, Murinson, BB, Pogatzki-Zahn, EM, Meyer, RA and Belzberg, AJ 2008. The tibial neuroma transposition (TNT) model of neuroma pain and hyperalgesia. Pain 134, 320334.
European Food Safety Authority 2007. Scientific report on the risks associated with tail biting in pigs and possible means to reduce the need for tail docking considering the different housing and husbandry systems. Annex to EFSA Journal 611, 113.
European Food Safety Authority 2012. Scientific opinion on the use of animal-based measures to assess welfare in pigs. EFSA Journal 10, 2512.
French, NP and Morgan, KL 1992. Neuromata in docked lambs’ tails. Research in Veterinary Science 52, 389390.
Gross, TL and Carr, SH 1990. Amputation neuroma of docked tails in dogs. Veterinary Pathology 27, 6162.
Harley, S, More, S, Boyle, L, O’Connell, N and Hanlon, A 2012. Good animal welfare makes economic sense: potential of pig abattoir meat inspection as a welfare surveillance tool. Irish Veterinary Journal 65, 11.
Hunter, EJ, Jones, TA, Guise, HJ, Penny, RHC and Hoste, S 2001. The relationship between tail biting in pigs, docking procedure and other management practices. The Veterinary Journal 161, 7279.
Keeling, LJ, Wallenbeck, A, Larsen, A and Holmgren, N 2012. Scoring tail damage in pigs: an evaluation based on recordings at Swedish slaughterhouses. Acta Veterinaria Scandinavica 54, 32.
Noonan, GJ, Rand, JS, Priest, J, Ainscow, J and Blackshaw, JK 1994. Behavioural observations of piglets undergoing tail docking, teeth clipping and ear notching. Applied Animal Behaviour Science 39, 203213.
Prunier, A, Mounier, AM and Hay, M 2005. Effects of castration, tooth resection, or tail docking on plasma metabolites and stress hormones in young pigs. Journal of Animal Science 83, 216222.
Sandercock, DA, Gibson, IF, Rutherford, KMD, Donald, RD, Lawrence, AB, Brash, HM, Scott, EM and Nolan, AM 2011. The impact of prenatal stress on basal nociception and evoked responses to tail-docking and inflammatory challenge in juvenile pigs. Physiology and Behaviour 104, 728737.
Sehirlioglu, A, Ozturk, C, Yazicioglu, K, Tugcu, I, Yilmaz, B and Goktepe, AS 2009. Painful neuroma requiring surgical excision after lower limb amputation caused by landmine explosions. International Orthopaedics 33, 533536.
Simonsen, HB, Klinken, L and Bindseil, E 1991. Histopathology of intact and docked pigtails. British Veterinary Journal 147, 407412.
Sutherland, MA and Tucker, CB 2011. The long and short of it: a review of tail docking in farm animals. Applied Animal Behaviour Science 135, 179191.
Sutherland, MA, Davis, BL and McGlone, JJ 2011. The effect of local and general anesthesia on the physiology and behavior of tail docked pigs. Animal 5, 12371246.
Sutherland, MA, Bryer, PJ, Krebs, N and McGlone, JJ 2008. Tail docking in pigs: acute physiological and behavioural responses. Animal 2, 292297.
Sutherland, MA, Bryer, PJ, Krebs, N and McGlone, JJ 2009. The effect of method of tail docking on tail-biting behavior and welfare of pigs. Animal Welfare 18, 561570.
Taylor, NR, Main, DCJ, Mendl, M and Edwards, SA 2010. Tail-biting: a new perspective. The Veterinary Journal 186, 137147.
Taylor, NR, Parker, RMA, Mendl, M, Edwards, SA and Main, DCJ 2012. Prevalence of risk factors for tail biting on commercial farms and intervention strategies. The Veterinary Journal 194, 7783.
Thodberg, K, Jensen, KH and Jørgensen, E 2010. The risk of tail-biting in relation to level of tail docking. Abstract presented at the International Congress of the ISAE, 4–7 August, Uppsala, Sweden, 91pp.
Torrey, S, Devillers, N, Lessard, M, Farmer, C and Widowski, T 2009. Effect of age on the behavioral and physiological responses of piglets to tail docking and ear notching. Journal of Animal Science 87, 17781786.
Wall, PD and Gutnick, M 1974. Properties of afferent nerve impulses originating from a neuroma. Nature 248, 740743.
Zhou, B, Yang, XJ, Zhao, RQ, Huang, RH, Wang, YH, Wang, ST, Yin, CP, Shen, Q, Wang, LY and Schinckel, AP 2013. Effects of tail docking and teeth clipping on the physiological responses, wounds, behavior, growth, and backfat depth of pigs. Journal of Animal Science 91, 49084916.


Effects of tail docking and docking length on neuroanatomical changes in healed tail tips of pigs

  • M. S. Herskin (a1), K. Thodberg (a1) and H. E. Jensen (a2)


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