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A review of the welfare consequences of surgical castration in piglets and the evaluation of non-surgical methods

Published online by Cambridge University Press:  11 January 2023

A Prunier*
Affiliation:
Unité Mixte de Recherche I.N.R.A. — Agrocampus, 35590 Saint-Gilles, France
M Bonneau
Affiliation:
Unité Mixte de Recherche I.N.R.A. — Agrocampus, 35590 Saint-Gilles, France
EH von Borell
Affiliation:
Institute of Animal Breeding and Husbandry with Veterinary Clinic, Martin-Luther-University Halle-Wittenberg, Adam-Kuckhoff-Str. 35, 06108 Halle, Germany
S Cinotti
Affiliation:
Facoltà di Medicina Veterinaria, Almamater Stunorum Universita, Via Tolara di Sopra 50, 40064 Ozzano Della Emilia, Italy
M Gunn
Affiliation:
Central Veterinary Research Laboratory, Abbotstown, Castleknock, Dublin 15, Ireland
B Fredriksen
Affiliation:
The Norwegian Meat Research Centre, PO Box 396 – Ökern, 0513 Oslo, Norway
M Giersing
Affiliation:
Royal Veterinary & Agriculture University, Department of Large Animal Science, Grønnegardsvej 8, Frederiksberg C 1870, Denmark
DB Morton
Affiliation:
Department of Biomedical Science and Biomedical, Ethics Medical School, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
FAM Tuyttens
Affiliation:
Department of Mechanisation–Labour–Buildings–Animal Welfare and Environmental Protection (DVL), Agricultural Research Centre (CLO), Burg Van Gansberghelaan 115, 9820 Merelbeke, Belgium
A Velarde
Affiliation:
Centre de Tecnologia de la Carn, IRTA, Granja Camps i Armet, 17121 Monells, Girona, Spain
*
* Correspondence and requests for reprints: [email protected]
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Abstract

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Male piglets are castrated primarily to prevent the unpleasant odours and flavours of entire male pig meat (boar-taint). Although castration can be legally performed without analgesia in the first seven days of life, available evidence shows that castration at any age is painful and may have a detrimental influence on health. Few anaesthetics or analgesics are licensed for use in piglets. The known methods for general and epidural anaesthesia cannot be run at the farm level for practical and/or legal reasons. Use of the local anaesthetic lidocaine is easy and allows the pain resulting from castration to be alleviated. Local destruction of testicular tissue by intra-testicular injection of chemical compounds (salts and acids) is an alternative to surgical castration but needs further investigation regarding welfare improvement and boar taint reduction. Immunocastration, by which castration is achieved using active immunisation (anti–GnRH immunisation) is an efficient alternative to surgical castration; however, there are no licensed vaccines in the EU and the consequences, in terms of pig welfare as well as its acceptability among EU consumers, need further evaluation.

Type
Research Article
Copyright
© 2006 Universities Federation for Animal Welfare

References

Awoniyi, CA, Chandrashekar, V, Arthur, RD, Schanbacher, BD, Amador, AG and Falvo, RE 1998 Pituitary and Leydig cell function in boars actively immunized against gonadotrophin-releasing hormone. Journal of Reproduction and Fertility 84: 295302CrossRefGoogle Scholar
Baggot, JD 2001 The Physiological Basis of Veterinary Clinical Pharmacology, 1st Edition 283pp. Blackwell Science: Oxford, UKGoogle Scholar
Bonneau, M, Dufour, R, Chouvet, C, Roulet, C and Squires, EJ 1994 The effects of immunization against luteinizing hormone-releasing hormone on performance, sexual development, and levels of boar taint-related compounds in intact male pigs. Journal of Animal Science 72: 1420CrossRefGoogle ScholarPubMed
Bonneau, M, Le Denmat, M, Vaudelet, JC, Veloso-Nunes, JR, Mortensen, AB and Mortensen, HP 1992 Contributions of fat androstenone and skatole to boar taint: I. Sensory attributes of fat and pork meat. Livestock Production Science 32: 6380CrossRefGoogle Scholar
Busch, W, Hagelschuer, H, Grauz, G, Richter, G and Werner, K 1979 Hormonal desexualisation of boars with chlormadinone acetate. Archiv für Experimentelle Veterinarmedizin 33: 99109Google Scholar
Caraty, A and Bonneau, M 1986 Immunisation active du porc mâle contre la gonadolibérine: effets sur la secrétion d'hormones gonadotropes et sur la teneur en 5a-androst-16-ène-3-one du tissu adipeux. Comptes Rendus des Séances de l'Académie des Sciences de Paris, Série D 303: 673676 [Title translation: Active immunisation of male pigs against GnRH: effects on gonadotrophin hormones and on androstenone level in fat tissue.]Google Scholar
Cohen, RDH, King, BD, Janzen, ED and Hunter, PSW 1991 Efficacy of chemical castration and effects of age at castration and implant regime on growth rate, testicular measurements and testosterone levels of beef calves. Canadian Journal of Animal Science 71: 111CrossRefGoogle Scholar
Cohen, RDH, King, BD, Thomas, LR and Janzen, ED 1990 Efficacy and stress of chemical versus surgical castration of cattle. Canadian Journal of Animal Science 70: 10631072CrossRefGoogle Scholar
Cronin, GM, Dunshea, FR, Butler, KL, McCauly, I, Barnett, JL and Hemsworth, PH 2003 The effects of immuno- and surgical castration on the behaviour and consequently growth of group-housed, male finisher pigs. Applied Animal Behaviour Science 81: 111126CrossRefGoogle Scholar
da Silva, JA 1999 Sex hormones and glucocorticoids: interactions with the immune system. Annals of the New York Academy of Sciences 876: 102117CrossRefGoogle ScholarPubMed
Daxenberger, A, Hageleit, M, Kraetzl, W, Lange, I, Claus, R, Bizec, B and Meyer, H 2001 Suppression of androstenone in entire male pigs by anabolic preparations. Livestock Production Science 69: 139144CrossRefGoogle Scholar
de Kruijf, JM and Welling, AA 1988 Incidence of chronic inflammations in gilts and castrated boars. Tijdschrift voor Diergeneeskunde 113: 415417Google ScholarPubMed
Denzer, L, Thompson, L, McKeith, F, Parrett, D and Thomas, D 1986 Evaluation of growth, carcass traits and reproductive organs of young boars in response to zeranol implantation. Journal of Animal Science 62: 11641171CrossRefGoogle ScholarPubMed
Dunshea, FR, Colantoni, C, Howard, K, McCauley, I, Jackson, P, Long, KA, Lopaticki, S, Nugent, EA, Simons, JA, Walker, J and Henessy, DP 2001 Vaccination of boars with a GnRH vaccine (Improvac) eliminates boar taint and increases growth performance. Journal of Animal Science 79: 25242535CrossRefGoogle ScholarPubMed
Earley, B and Crowe, MA 2002 Effects of ketoprofen alone or in combination with local anaesthesia during the castration of bull calves on plasma cortisol, immunological, and inflammatory responses. Journal of Animal Science 80: 10441052CrossRefGoogle ScholarPubMed
EFSA 2004 Welfare aspects of the castration of piglets. Scientific Report of the Scientific Panel for Animal Health and Welfare on a request from the Commission related to welfare aspects of the castration of piglets European Food Safety Authority AHAW/04-087. (http://www.efsa.eu.int/science/ahaw_opinions/512_it.html)Google Scholar
Fahim, MS 1994 Chemical castration. United States Patent 5372822, Application No. 206469. United States Patent and Trademark Office. http://xrint.com/patents/us/5372822 (accessed 6 May 2006)Google Scholar
Falvo, RE, Chandrashekar, V, Arthur, RD, Kuenstler, AR, Hasson, T, Awoniyi, C and Schanbacher, BD 1986 Effect of active immunization against LHRH or LH in boars: reproductive consequences and performance traits. Journal of Animal Science 63: 986994CrossRefGoogle ScholarPubMed
Fisher, AD, Crowe, MA, Nuallain, EMO, Prendiville, DJ, O'Kiely, P and Enright, WJ 1997 Effects of suppressing cortisol following castration of bull calves on adrenocorticotropic hormone, in vitro interferon- gamma production, leukocytes, acute-phase proteins, growth, and feed intake. Journal of Animal Science 75: 18991908CrossRefGoogle ScholarPubMed
Fordyce, G, Hodge, PB, Beaman, NJ, Laing, AR, Campero, C and Shepherd, RK 1989 An evaluation of calf castration by intratesticular injection of a lactic acid solution. Australian Veterinary Journal 66: 272276CrossRefGoogle ScholarPubMed
Gardner, IA 1980 Sclerosing sterilisation in bulls. New South Wales Veterinary Proceedings 16: 6061Google Scholar
Gentle, MJ 1986 Neuroma formation following partial beak amputation (beak trimming) in the chicken. Research in Veterinary Science 41: 383385CrossRefGoogle ScholarPubMed
Giri, SC, Yadav, BPS and Panda, SK 2002 Chemical castration in pigs. Indian Journal of Animal Science 72: 451453Google Scholar
Haga, HA and Ranheim, B 2005 Castration of piglets: the analgesic effects of intratesticular or intrafunicular lidocaine injection. Veterinary Anaesthesia and Analgesia 32: 19CrossRefGoogle ScholarPubMed
Hagen, G, Andresen, O, Framstad, T, Bliechfield, T and Berg, KA 1988 Effects of immunisation of young boars against gonadotropin-releasing hormone. In: Proceedings of the 11th Internal Congress on Animal Reproduction and Artificial Insemination pp 493-495. 26–30 June 1988. Dublin, IrelandGoogle Scholar
Hay, M, Vulin, A, Genin, S, Sales, P and Prunier, A 2003 Assessment of pain induced by castration in piglets: behavioral and physiological responses over the subsequent 5 days. Applied Animal Behaviour Science 82: 201218CrossRefGoogle Scholar
Hill, GM, Neville, WE, Richardson, KL, Utley, PR and Stewart, RL 1985 Castration method and progesterone-estradiol implant effects on growth rate of suckling calves. Journal of Dairy Science 68: 30593061CrossRefGoogle ScholarPubMed
Horn, T, Marx, G and von Borell, E 1999 Verhalten von Ferkeln wahrend der Kastration mit und ohne Lokalanasthesie. Deutsche Tierarztliche Wochenschrift 106: 271274. [Title translation: Behaviour of piglets during castration with and without local anaesthesia.]Google Scholar
Jaros P, Burgi E, Stark KBC, Claus R, Hennessy D, Thun 2005 Effect of active immunization against GnRH on androstenone concentration, growth performance and carcass quality in intact male pigs. Livestock Production Science 92: 3138CrossRefGoogle Scholar
Kang, YS, Park, CS and Chung, HS 1993 Chemical castration by intracellular injection of silver nitrate solution in pigs. Korean Journal of Animal Science 35: 463469Google Scholar
Kent, JE, Molony, V and Robertson, IS 1993 Changes in plasma cortisol concentration in lambs of three ages after three methods of castration and tail docking. Research in Veterinary Science 55: 245251CrossRefGoogle ScholarPubMed
Kielly, J, Dewey, CE and Cochran, M 1999 Castration at 3 days of age temporarily slows growth of pigs. Swine Health Production 7: 151153Google Scholar
Kohler, I, Moens, Y, Busato, A, Blum, J and Schatzmann, U 1998 Inhalation anaesthesia for the castration of piglets: CO2 compared to halothane. Journal of Veterinary Medicine, Series A 45: 625633CrossRefGoogle ScholarPubMed
Lessard, M, Taylor, AA, Braithwaite, L and Weary, DM 2002 Humoral and cellular immune responses of piglets after castration at different ages. Canadian Journal of American Science 82: 519526Google Scholar
Liu, CY, Cheng, LC, Yang, PC, Chang, TY, Shen, M, Finstad, CL and Wang, CY 2001 Effects of immunization against LHRH on growth performance, sex characteristics, and meat quality of intact male pigs. Journal of Animal Science 79 Supplement 1: 51Google Scholar
Ljaz, A, Abkakhail, AA and Khamas, WAH 2000 Effect of intratesticular injection of formalin on seminiferous tubules in Awassi lambs. Pakistan Veterinary Journal 20: 129134Google Scholar
Lopez-Bote, C and Ventanas, J 1988 The reduction of boar taint in male pigs by neonatal testosterone administration. Meat Science 22: 1631718CrossRefGoogle ScholarPubMed
Manns, JG and Robbins, SR 1997 Prevention of boar taint with a recombinant based GnRH vaccine. In: Bonneau M, Lundstrom B (ed) Boar taint in entire male pigs. pp 137-140, EAAP Publication 92, Wageningen, The NetherlandsGoogle Scholar
Marx, G, Horn, T, Thielebein, J, Knubel, B and von Borell, E 2003 Analysis of pain-related vocalization in young pigs. Journal of Sound and Vibration 266: 687698CrossRefGoogle Scholar
McCauley, I, Watt, M, Suster, D, Kerton, DJ, Oliver, WT, Harrell, RJ and Dunshea, FR 2003 A GnRF vaccine (Improvac®) and porcine somatotropin (Reporcin®) have syner-gistic effects upon growth performance in both boars and gilts. Australian Journal of Agricultural Research 54: 1120CrossRefGoogle Scholar
McGlone, JJ and Hellman, JM 1988 Local and general anesthetic effects on behaviour and performance of two and seven-week old castrated and uncastrated piglets. Journal of Animal Science 66: 30493058CrossRefGoogle ScholarPubMed
McGlone, JJ, Nicholson, RI, Hellman, JM and Herzog, DN 1993 The development of pain in young pigs associated with castration and attempts to prevent castration-induced behavioral changes. Journal of Animal Science 71: 14411446CrossRefGoogle ScholarPubMed
Mellor, DJ, Cook, CJ and Stafford, KJ 2000 Quantifying some responses to pain as a stressor. In: Moberg, GP and Mench, JA (eds) The Biology of Animal Stress pp 173198. CAB International: Wallingford, UKGoogle Scholar
Meloen, RH, Turkstra, JA, Lankhof, H, Puijk, WC, Schaaper, WMM, Dijkstra, G, Wensing, CJG and Oonk, RB 1994 Efficient immunocastration of male piglets by immunoneutralization of GnRH, using a new GnRH-like peptide. Vaccine 12: 741746CrossRefGoogle ScholarPubMed
Metz, C, Hohl, K, Waidelich, S, Drochner, W and Claus, R 2002 Active immunization of boars against GnRH at an early age: consequences for testicular function, boar taint accumulation and N-retention. Livestock Production Science 74: 147157CrossRefGoogle Scholar
Molenaar, GJ, Lugard-Kok, C, Meloen, RH, Oonk, RB, De Koning, J and Wensing, CJ 1993 Lesions in the hypothalamus after active immunisation against GnRH in the pig. Journal of Neuroimmunology 48: 111CrossRefGoogle ScholarPubMed
Molony, V and Kent, JE 1997 Assessment of acute pain in farm animals using behavioural and physiological measurements. Journal of Animal Science 75: 266272Google ScholarPubMed
Nishumara, N, Kawate, N, Sawada, T and Mori, J 1992 Chemical castration by a single intratesticular injection of lactic acid in rats and dogs. Journal of Reproduction and Development 38: 263266CrossRefGoogle Scholar
Nyborg, PY, Sorig, A, Lykkegaard, K and Svendsen, O 2000 Nociception after castration of juvenile pigs determined by quantitative estimation of c–Fos expressing neurons in the spinal cord dorsal horn. Dansk Veterinaertidsskrift 83: 1617Google Scholar
Oliver, WT, McCauley, I, Harrell, RJ, Suster, D, Kerton, DJ and Dunshea, FR 2003 A gonadotropin-releasing factor vaccine (Improvac) and porcine somatotropin have synergistic and additive effects on growth performance in group-housed boars and gilts. Journal of Animal Science 81: 19591966CrossRefGoogle ScholarPubMed
Oonk, HB, Turkstra, JA, Lankhof, H, Schaaper, W, Verheijden, JHM and Meloen, RH 1995a Testis size after immunocastration as parameter for the absence of boar taint. Livestock Production Science 42: 6371Google Scholar
Oonk, RB, Turkstra, JA, Schaaper, WMM and Meloen, RH 1995b Further experience with anti-GnRH vaccines in male pigs. EAAP Working Group. Production and utilisation of meat from entire male pigs p 1-5. 27-29 September, Milton Keynes, UKGoogle Scholar
Penny, RCH and Hill, FWG 1974 Observations of some conditions in pig at the abattoir with particular reference to tail biting. The Veterinary Record 94: 174178CrossRefGoogle ScholarPubMed
Prunier, A, Hay, M and Servière, J 2002 Evaluation et prévention de la douleur induite par les interventions de convenance chez le porcelet. Journées de la Recherche Porcine en France 34: 257268 [Title translation: Assessment and reduction of pain induced by routine practices in piglets.]Google Scholar
Prunier, A, Mounier, AM and Hay, M 2005 Effects of castration, tooth resection or tail docking on plasma metabolites and stress hormones in pigs. Journal of Animal Science 83: 216222CrossRefGoogle ScholarPubMed
Prunier, A, Moriez, R and Mounier, AM 2005 The use of plasma profiles of cortisol and ACTH to assess the efficacy of local anaesthesia and preemptive analgesia in relieving pain at castration in piglets. 3rd International Workshop WAFL-05. p 94. 22-24 September, Vienna, AustriaGoogle Scholar
Ra, ABM and Gregory, NG 1995 Welfare implications of the gas stunning of pigs. Determination of aversion to the initial inhalation of carbon dioxide or argon. Animal Welfare 4: 273280Google Scholar
Ranheim, B, Haga, HA, Andresen, O and Ingebrigtsen, K 2003 Distribution of radioactive lidocaïne injected into the testes in piglets: preliminary results. 8th World Congress of Veterinary Anesthesia p 209. 16–20 September. Knoxville Tennessee, USAGoogle Scholar
Reid, J, Dufour, JJ and Sirard, MA 1996 Effect of a single injection of a long-acting gonadotropin-releasing hormone agonist on prepubertal male and female pigs on reproductive organs, growth performance and sensory qualities of pork roasts. Reproduction Nutrition Development 36: 321332Google ScholarPubMed
Robertson, IS, Kent, JE and Molony, V 1994 Effect of different methods of castration on behaviour and plasma cortisol in calves of three ages. Research in Veterinary Science 56: 817CrossRefGoogle ScholarPubMed
Schneider, F, Falkenberg, H, Kuhn, G, Nurnberg, K, Rehfeldt, C and Kanitz, W 1998 Effects of treating young boars with a GnRH depot formulation on endocrine functions, testis size, boar taint, carcass composition and muscular structure. Animal Reproduction Science 50: 6980CrossRefGoogle ScholarPubMed
Schönreiter, S, Lohmuller, V, Huber, H, Zanella, AJ, Unshelm, J and Erhardt, W 2000 Effects of the CO2/O2-anaes-thesia on behaviour, beta-endorphin and cortisol concentrations of male piglets after castration. KTBL-Schrif 391: 137145Google Scholar
Setchell, BP, Maddocks, S and Brooks, DE 1994 Anatomy, vasculature, innervation and fluids of the male reproductive tract. In: Knobil, E and Neill, JD (eds) The Physiology of Reproduction, Volume 1 pp 10631175. Raven Press: New York, USAGoogle Scholar
Sjaastad, ØV, Hove, K and Sand, O 2003 Physiology of domestic animals, pp 735 Scandinavian Press, Oslo, NorwayGoogle Scholar
Strøm, I 1996 Arthritis in piglets. Dansk Veterinaertidsskrift 79: 575577Google Scholar
Taddio, A, Goldbach, M, Ipp, M, Stevens, B and Koren, G 1995 Effect of neonatal circumcision on pain responses during vaccination in boys. Lancet 345: 291292CrossRefGoogle ScholarPubMed
Taylor, AA and Weary, DM 2000 Vocal responses of piglets to castration: identifying procedural sources of pain. Applied Animal Behaviour Science 70: 1726CrossRefGoogle ScholarPubMed
Taylor, AA, Weary, DM, Lessard, M and Braithwaite, LA 2001 Behavioural responses of piglets to castration: the effect of pig age. Applied Animal Behaviour Science 73: 3545CrossRefGoogle Scholar
Tielen, MJM 1974 De frekwentie en de zoötechnische precentie van long-en leveraandoeningen bij varkens. Proefschrift Landbouwhogeschool Wageningen PhD Thesis, Medelingen Landbouwhogeschool, Wageningen, The Netherlands. [Title translation: Incidence and zootechnical prevention of lung and liver disorders in pigs.]Google Scholar
Turkstra, JA, Zeng, XY, Diepen, JTM, van Jongbloed, AW, Oonk, HB, van de Wiel, DFM and Meloen, RH 2002 Performance of male pigs immunised against GnRH is related to the time of onset of biological response. Journal of Animal Science 80: 29532959CrossRefGoogle Scholar
Van der Lende, T, Kruijt, L and Tieman, M 1993 Can passive immunization with anti-GnRH monoclonal antibodies, injected a few weeks before slaughter, prevent boar taint? In: Bonneau M (ed) Measurement and Prevention of Boar Taint pp 201206. INRA Editions: Paris, FranceGoogle Scholar
Vargas, L, Sewell, R, Marshall, A, Galatioto, J, Tsang, YY, Catterall, JF and Hunnicut, GR 2005 Immune complex deposition in adult male Sprague-Dawley rats chronically immunized with GnRH. American Journal of Reproductive Immunology. 54: 292310CrossRefGoogle ScholarPubMed
Waldmann, KH, Otto, K and Bollwahn, W 1994 Ferkelkastration — Schmerzempfinden und Schmerzausschaltung. Deutsche Tierarztliche Wochenschrift 101: 105109 [Title translation: Castration of piglets — pain and anaesthesia.]Google Scholar
Walker, BN, Jäggin, N, Doherr, M and Schatzmann, U 2004 Inhalation anaesthesia for castration of newborn piglets: experiences with isoflurane and isoflurane/N2O. Journal of Veterinary Medicine, Series A 51: 151154CrossRefGoogle Scholar
Weary, DM, Braithwaite, LA and Fraser, D 1998 Vocal response to pain in piglets. Applied Animal Behaviour Science 56: 161172Google Scholar
Wemelsfelder, F and van Putten, G 1985 Behaviour as a possible indicator for pain in piglets. Report B-260, Instituut voor Veeteeltkundig Onderzoek ‘Schoonoord’, Zeist, The NetherlandsGoogle Scholar
White, RG, DeShazer, JA, Tressler, CJ, Borcher, GM, Davey, S, Waninge, A, Parkhurst, AM, Milanuk, MJ and Clemens, ET 1995 Vocalization and physiological response of pigs during castration with or without a local anesthetic. Journal of Animal Science 73: 381386Google ScholarPubMed
Xue, JL, Dial, GD, Bartsh, S, Kerkaert, B, Squires, EJ, Marsh, WE and Ferre, G 1994 Influence of a gonadotropin-releasing hormone agonist on circulating levels of luteinizing hormone and testosterone and tissue levels of compounds associated with boar taint. Journal of Animal Science 72: 12901298CrossRefGoogle Scholar
Zeng, XY, Turkstra, JA, Jungbloed, AW, van Diepen, JTM, Meloen, RH, Oonk, HB, Guo, DZ and van de Wiel, DFM 2002a Performance and hormone levels of immunocastrated, surgically castrated and intact male pigs fed ad libitum high- and low-energy diets. Livestock Production Science 77: 111CrossRefGoogle Scholar
Zeng, XY, Turkstra, J, Meloen, R, Liu, X, Chen, F, Schaaper, W, Oonk, H, Guo, D and van de Wiel, DFM 2002b Active immunization against gonadotrophin-releasing hormone in Chinese male pigs: effects of dose on antibody titer, hormone levels and sexual development. Animal Reproduction Science 70: 223233CrossRefGoogle ScholarPubMed
Ziecik, AJ, Esbenshade, KL and Britt, JH 1989 Effects of a gonadotrophin-releasing hormone antagonist on gonadotrophin secretion and gonadal development. Journal of Reproduction and Fertility 87: 281289Google ScholarPubMed