Update on Tail biting in pigs: An undesirable damaging behaviour


Keywords:
tail biting pig health pig welfare pig behaviour
M KAKANIS
EN SOSSIDOU
SK KRITAS
ED TZIKA
Abstract

Tail-biting is an abnormal behavior of multifactorial origin, that consists a major problem in modern pig industry. It has a serious impact on both welfare and health status of the pigs involved, as well as on economic profitability of the farm. It is considered to be a problem of pig adaptation in poor environment triggered by a plethora of external and internal risk factors interacting with each other. A great variation exists on prevalence of tail biting between different studies across the world. Tail docking is the common practice applied by farmers to prevent this behavior, while treatments are based on enrichment material provision. The aim of this review is to explore the most recent literature on risk factors and impacts of tail biting and to discuss promising areas on early prediction and treatment of the topic.

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References
Alban, L., Petersen, J. V., Busch, M.E., 2015. A comparison of lesions found during meat inspection of finishing pigs raised under organic/free-range conditions and conventional indoor conditions 85-88.
Averós, X., Brossard, L., Dourmad, J.Y., de Greef, K.H., Edge, H.L., Edwards, S.A., Meunier-Salaün, M.C., 2010. A meta-analysis of the combined effect of housing and environmental enrichment characteristics on the behaviour and performance of pigs. Applied Animal Behaviour Science 127, 73-85.
Becskei Z., Kakanis M.,Janczak A., Sossidou E. 2018. CA 15134 “GROUPHOUSENET” Prevalence of tail biting behavior in Greek pig farms. Proceedings of 25th International Conferecne Animal Protection and Welfare 2018
Becskei Zolt, 2017. Short-Term Scientific Mission (STSM) Report Cost Action CA15134 „Synergy for preventing damaging behaviour in group housed pigs and chicken (GroupHouseNet)” Available online:https://www.grouphousenet.eu/STSM_Becskei%20Zsolt.pdf [accessed 30/07/2020].
Beaudoin, J.M., Bergeron, R., Devillers, N., Laforest, J.P., 2019. Growing pigs’ interest in enrichment objects with different characteristics and cleanliness. Animals 9, 1-13.
Benjamin, M., Yik, S., 2019. Precision livestock farming in swinewelfare: A review for swine practitioners. Animals 9, 1-21.
Boyle, L., 2019. Associations between tail directed behaviour, tail lesions and enrichment type in finisher pigs. Book of Abstracts of the 70th Annual Meeting of the European Federation of Animal Science pp 206.
Bracke, M.B.M., 2017. Chapter 6. Chains as proper enrichment material for intensively-farmed pigs? Advances in Pig Welfare 1-27.
Bracke, M.B.M., De Lauwere, C.C., Wind, S.M.M., Zonerland, J.J., 2013. Attitudes of Dutch Pig Farmers Towards Tail Biting and Tail Docking. Journal of Agricultural and Environmental Ethics 26, 847-868.
Bracke, M.B.M., Koene, P., 2019. Expert opinion on metal chains and other indestructible objects as proper enrichment for intensively-farmed pigs. PLoS ONE 14, 1-19.
Breuer, K., Sutcliffe, M.E.M., Mercer, J.T., Rance, K.A., O’Connell, N.E., Sneddon, I.A., Edwards, S.A., 2005. Heritability of clinical tail-biting and its relation to performance traits. Livestock Production Science 93, 87-94.
Brunberg, E., Jensen, P., Isaksson, A., Keeling, L.J., 2013. Brain gene expression differences are associated with abnormal tail biting behaviour in pigs. Genes, Brain and Behavior 12, 275-281.
Brunberg, E., Wallenbeck, A., Keeling, L.J., 2011. Tail biting in fattening pigs: Associations between frequency of tail biting and other abnormal behaviours. Applied Animal Behaviour Science 133, 18-25.
Brunberg, E.I., Bas Rodenburg, T., Rydhmer, L., Kjaer, J.B., Jensen, P., Keeling, L.J., 2016. Omnivores going astray: A review and new synthesis of abnormal behavior in pigs and laying hens. Frontiers in Veterinary Science 3, 1-15.
Buijs, S., Muns, R., 2019. A review of the effects of non-straw enrichment on tail biting in pigs. Animals 9.
Bulens, A., Van Beirendonck, S., Van Thielen, J., Buys, N., Driessen, B., 2018. Rearing finishing pigs with intact tails: Do they benefit from an enriched environment? Journal of Veterinary Behavior: Clinical Applications and Research 24, 1-8.
Calderón Díaz, J.A., Boyle, L.A., Diana, A., Leonard, F.C., Moriarty, J.P., McElroy, M.C., McGettrick, S., Kelliher, D., García Manzanilla, E., 2017. Early life indicators predict mortality, illness, reduced welfare and carcass characteristics in finisher pigs. Preventive Veterinary Medicine 146, 94-102.
Camerlink, I., Ursinus, W.W., Bijma, P., Kemp, B., Bolhuis, J.E., 2014. Indirect Genetic Effects for Growth Rate in Domestic Pigs Alter Aggressive and Manipulative Biting Behaviour. Behavior Genetics 45, 117-126.
Camerlink, I. and Turner, S.P. (2016) Farmers’ perception of aggression between growing pigs. Applied Animal Behaviour Science. ISSN 0309-1740.
Carroll, G.A., Boyle, L.A., Hanlon, A., Collins, L., Griffin, K., Friel, M., Armstrong, D., O’Connell, N.E., 2018. What can carcass-based assessments tell us about the lifetime welfare status of pigs? Livestock Science 214, 98-105.
Carroll, G.A., Boyle, L.A., Teixeira, D.L., Van Staaveren, N., Hanlon, A., O’Connell, N.E., Staaveren, N. Van, Hanlon, A., Connell, N.E.O., Van Staaveren, N., Hanlon, A., O’Connell, N.E., 2015. Effects of scalding and dehairing of pig carcasses at abattoirs on the visibility of welfare-related lesions. Animal 10, 460-467.
Chou, J.-Y.Y., Drique, C.M.V. V., Sandercock, D.A., D’Eath, R.B., O’Driscoll, K., Chou, J.-Y.Y., Drique, C.M.V. V., Sandercock, D.A., D’Eath, R.B., O’Driscoll, K., 2019a. Rearing undocked pigs on fully slatted floors using multiple types and variations of enrichment. Animals 9, 1-17.
Chou, J.-Y.Y., O’Driscoll, K., D’Eath, R.B., Sandercock, D.A., Camerlink, I., 2019b. Multi-step tail biting outbreak intervention protocols for pigs housed on slatted floors. Animals 9, 582.
Chou, J.Y., D’Eath, R.B., Sandercock, D.A., Waran, N., Haigh, A., O’Driscoll, K., 2018. Use of different wood types as environmental enrichment to manage tail biting in docked pigs in a commercial fully-
slatted system. Livestock Science 213, 19-27.
Correia-Gomes, C., Eze, J.I., Borobia-Belsué, J., Tucker, A.W., Sparrow, D., Strachan, D., Gunn, G.J., 2017. Voluntary monitoring systems for pig health and welfare in the UK: Comparative analysis of prevalence and temporal patterns of selected non-respiratory post mortem conditions. Preventive Veterinary Medicine 146, 1-9.
D’Eath, R.B., Arnott, G., Turner, S.P., Jensen, T., Lahrmann, H.P., Busch, M.E., Niemi, J.K., Lawrence, A.B., Sandøe, P., 2014. Injurious tail biting in pigs: How can it be controlled in existing systems without tail docking? Animal 8, 1479-1497.
D’Eath, R.B., Jack, M., Futro, A., Talbot, D., Zhu, Q., Barclay, D., Baxter, E.M., Zhu, Q., Baxter, E.M., D’Eath, R.B., Jack, M., Talbot, D., 2018. Automatic early warning of tail biting in pigs: 3D cameras can detect lowered tail posture before an outbreak. PLoS ONE 13, 1-18.
D’Eath, R.B., Niemi, J.K., Vosough Ahmadi, B., Rutherford, K.M.D., Ison, S.H., Turner, S.P., Anker, H.T., Jensen, T., Busch, M.E., Jensen, K.K., Lawrence, A.B., Sandøe, P., 2016. Why are most EU pigs tail docked? Economic and ethical analysis of four pig housing and management scenarios in the light of EU legislation and animal welfare outcomes. Animal 10, 687-699.
Dalmau, A., Areal, B., Machado, S., Pallisera, J., Velarde, A., 2019. Does the location of enrichment material affect behavior and dirtiness in growing female pigs? Journal of Applied Animal Welfare Science 22,116-126.
De Briyne, N., Berg, C., Blaha, T., Palzer, A., Temple, D., 2018. “Phasing out pig tail docking in the EU - present state, challenges and possibilities.” Porcine Health Management 4, 1-9.
Di Martino, G., Scollo, A., Gottardo, F., Stefani, A.L., Schiavon, E., Capello, K., Marangon, S., Bonfanti, L., 2015. The effect of tail docking on the welfare of pigs housed under challenging conditions. Livestock Science 173, 78-86.
Domun, Y., Pedersen, L.J., White, D., Adeyemi, O., Norton, T., 2019. Learning patterns from time-series data to discriminate predictions of tail-biting, fouling and diarrhoea in pigs. Computers and Electronics in Agriculture 163, 104878.
Edwards, S.A., 2006. Tail biting in pigs: Understanding the intractable problem. Veterinary Journal 171, 198-199.
European Union. Council of the European Union, 2008. Council Directive 2008/120/EC laying down minimum standards for the protection of pigs. Official Journal of the European Union L47/5-13.
European Union. Council Directive 91/630/EEC of 19 November 1991 laying down minimum standards for the protection of pigs. Off. J. Eur. Union 1991,50, 33-38European Union.
Commission Recommendation (EU) 2016/336 on the application of Council Directive 2008/120/EC laying down minimum standards for the protection of pigs as regards measures to reduce the need for tail-docking. Off. J. Eur. Union 2016, L62, 20.
European Union. Council Directive 2008/120/EC of 18 December 2008 laying down minimum standards for the protection of pigs (Codified version). Off. J. Eur. Union 2009, L47, 5-13. 17.
European Union. Communication from the commission to the European Parliament, the Council and the Eurpean Economic and Social Committee on the European Union Strategy for the Protection and Welfare of Animals 2012-2015 COM(2012) 6 final.
European Food Safety Authority EFSA. 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. EFSA J.
, 5,611.
European Commission, Directorate Health and Food Audits and Analysis. Audit Reports. Available online: https://ec.europa.eu/food/audits-analysis/audit_reports/index.cfm [accessed 30/07/2020].
Fertner, M., Denwood, M., Birkegård, A.C., Stege, H., Boklund, A., 2017. Associations between antibacterial treatment and the prevalence of tail-biting-related sequelae in Danish finishers at slaughter. Frontiers in Veterinary Science 4, 1-8.
Fu, L., Zhou, B., Li, H., Schinckel, A.P., Liang, T., Chu, Q., Li, Y., Xu, F., 2018. Teeth clipping, tail docking and toy enrichment affect physiological indicators, behaviour and lesions of weaned pigs after re-location and mixing. Livestock Science 212, 137-142.
Grümpel, A., Krieter, J., Veit, C., Dippel, S., 2018. Factors influencing the risk for tail lesions in weaner pigs (Sus scrofa). Livestock Science 216, 219-226.
Haigh, A., Yun-Chou, J., O’Driscoll, K., 2019. An investigation into the effectiveness of compressed straw blocks in reducing abnormal behaviour in growing pigs. Animal 1-10.
Harley, S., Boyle, L.A., O’Connell, N.E., More, S.J., Teixeira, D.L., Hanlon, A., 2014. Docking the value of pigmeat? Prevalence and financial implications of welfare lesions in Irish slaughter pigs. Animal
Welfare 23, 275-285.
Harley, Sarah, More, S., Boyle, L., O’Connell, N., Hanlon, A., 2012a. Good animal welfare makes economic sense: Potential of pig abattoir meat inspection as a welfare surveillance tool. Irish Veterinary Journal 65, 1.
Harley, S., More, S.J., O’Connell, N.E., Hanlon, A., Teixeira, D., Boyle, L., 2012b. Evaluating the prevalence of tail biting and carcase condemnations in slaughter pigs in the Republic and Northern Ireland, and the potential of abattoir meat inspection as a welfare surveillance tool. Veterinary Record 171, 621.
Heinonen, M., Orro, T., Kokkonen, T., Munsterhjelm, C., Peltoniemi, O., Valros, A., 2010. Tail biting induces a strong acute phase response and tail-end inflammation in finishing pigs. Veterinary Journal 184, 303-307.
Herskin, M.S., Thodberg, K., Jensen, H.E., 2015. Effects of tail docking and docking length on neuroanatomical changes in healed tail tips of pigs. Animal 9, 677-681.
Holling, C., Beilage, E.G., Vidondo, B., Nathues, C., 2017. Provision of straw by a foraging tower - Effect on tail biting in weaners and fattening pigs. Porcine Health Management 3, 1-14.
Hunter, E.J., Jones, T.A., Guise, H.J., Penny, R.H.C., Hoste, S., 2001. The Relationship between Tail Biting in Pigs, Docking Procedure and Other Management Practices. Veterinary Journal 161, 72-79.
Kakanis M., Marinou K., Doudounakis S., Sossidou E..2019 Greek farmers’ attitudes regarding tail biting and tail docking Book of Abstracts of the 70th Annual Meeting of the European Federation of Animal Science p.p. 203.
Keeling, L.J., Wallenbeck, A., Larsen, A., Holmgren, N., 2012. Scoring tail damage in pigs: An evaluation based on recordings at Swedish slaughterhouses. Acta Veterinaria Scandinavica 138, 1.
Klaaborg, J., Kristensen, A.R., Brandt, P., 2019. The effect of pen environment on pen-mate directed behaviour prior to feeding in finisher pigs with intact tails. Livestock Science 219, 35-39.
Kongsted, H., Sørensen, J.T., 2017. Lesions found at routine meat inspection on finishing pigs are associated with production system. Veterinary Journal 223, 21-26.
Kritas, S.K., Morrison, R.B., 2007. Relationships between tail biting in pigs and disease lesions and condemnations at slaughter. Veterinary Record 160, 149-152.
Kritas, S.K., Morrison, R.B., 2004. An observational study on tail biting in commercial grower-finisher barns. Journal of Swine Health and Production 12, 17-22.
Lahrmann, H.P., Busch, M.E., D’Eath, R.B., Forkman, B., Hansen, C.F., 2017. More tail lesions among undocked than tail docked pigs in a conventional herd. Animal 11, 1825-1831.
Lahrmann, H.P., Faustrup, J.F., Hansen, C.F., D’eath, R.B., Nielsen, J.P., Forkman, B., 2019. The effect of straw, rope, and bite-rite treatment in weaner pens with a tail biting outbreak. Animals 9, 1-15.
Lahrmann, H.P., Hansen, C.F., D’Eath, R., Busch, M.E., Forkman, B., 2018a. Tail posture predicts tail biting outbreaks at pen level in weaner pigs. Applied Animal Behaviour Science 200, 29-35.
Lahrmann, H.P., Hansen, C.F., D´Eath, R.B., Busch, M.E., Nielsen, J.P., Forkman, B., 2018b. Early intervention with enrichment can prevent tail biting outbreaks in weaner pigs. Livestock Science 214, 272-277.
Larsen, M.L.V., Andersen, H.M.L., Pedersen, L.J., 2019. Changes in activity and object manipulation before tail damage in finisher pigs as an early detector of tail biting. Animal 13, 1037-1044.
Larsen, Mona Lilian Vestbjerg, Andersen, H.M.L., Pedersen, L.J., 2018b. Tail posture as a detector of tail damage and an early detector of tail biting in finishing pigs. Applied Animal Behaviour Science 209, 30-35.
Larsen, M. L.V., Andersen, H.M.L., Pedersen, L.J., 2018a. Which is the most preventive measure against tail damage in finisher pigs: Tail docking, straw provision or lowered stocking density? Animal 12, 1260-1267.
Li, Y., Zhang, H., Johnston, L.J., Martin, W., 2018. Understanding tail-biting in pigs through social network analysis. Animals 8, 1-13.
Li, Y.Z., Zhang, H.F., Johnston, L.J., Martin, W., Peterson, J.D., Coetzee, J.F., 2017. Effects of tail docking and tail biting on performance and welfare of growing-finishing pigs in a confinement housing system. Journal of Animal Science 95, 4835-4845.
Marques, B.M.F.P.P., Bernardi, M.L., Coelho, C.F., Almeida, M., Morales, O.E., Mores, T.J., Borowski, S.M., Barcellos, D.E.S.N., 2012.
Influence of tail biting on weight gain, lesions and condemnations at slaughter of liinishing pigs. Pesquisa Veterinaria Brasileira 32, 967-974. Meyer-Hamme, S.E.K., Lambertz, C., Gauly, M., 2016. Does group size have an impact on welfare indicators in fattening pigs? Animal 10, 142-149.
Moinard, C., Mendl, M., Nicol, C.J., Green, L.E., 2003. A case control study of on-farm risk factors for tail biting in pigs. Applied Animal Behaviour Science 81, 333-355.
Munsterhjelm, C., Heinonen, M., Valros, A., 2016. Can tail-in-mouth behaviour in weaned piglets be predicted by behaviour and performance? Applied Animal Behaviour Science 184, 16-24.
Munsterhjelm, C., Heinonen, M., Valros, A., 2015. Effects of clinical lameness and tail biting lesions on voluntary feed intake in growing pigs. Livestock Science 181, 210-219.
Munsterhjelm, C., Nordgreen, J., Aae, F., Heinonen, M., Olstad, K., Aasmundstad, T., Janczak, A.M., Valros, A., 2017. To be blamed or pitied? The effect of illness on social behavior, cytokine levels and feed intake in undocked boars. Physiology and Behavior 179, 298-307.
Munsterhjelm, C., Nordgreen, J., Aae, F., Heinonen, M., Valros, A., Janczak, A.M., 2019. Sick and grumpy: Changes in social behaviour after a controlled immune stimulation in group-housed gilts. Physiology and Behavior 198, 76-83.
Munsterhjelm, C., Simola, O., Keeling, L., Valros, A., Heinonen, M., 2013. Health parameters in tail biters and bitten pigs in a case-control study. Animal 7, 814-821.
Nalon, E., De Briyne, N., 2019. Efforts to ban the routine tail docking of pigs and to give pigs enrichment materials via EU law: Where do we stand a quarter of a century on? Animals 9.
Naya, A., Gertz, M., Hasler, M., Große Beilage, E., Krieter, J., 2019a. Does a higher content of fibre in the piglet diet have an influence on tail biting in growing pigs? Livestock Science 223, 133-137.
Naya, A., Traulsen, I., Gertz, M., Hasler, M., Burfeind, O., große Beilage, E., Krieter, J., 2019b. Is tail biting in growing pigs reduced by a prolonged suckling period? Applied Animal Behaviour Science 211, 41-46.
Niemi, J.K., Sinisalo, A., Valros, A., Heinonen, M., 2012. New challenges for EU agricultural sector and rural areas . Which role for public policy? Market and policy-oriented incentives to provide animal welfare: The case of tail biting. 126th EAAE Seminar 1-13.
Nordkvist E. and Häggblom P.,2014 Fusarium mycotoxin contamination of cereals and bedding straw at Swedish pig farms. Animal Feed Science and Technology 198, 231-237.
Palander, P.A., Heinonen, M., Simpura, I., Edwards, S.A., Valros, A.E., 2013. Jejunal morphology and blood metabolites in tail biting, victim and control pigs. Animal 7, 1523-1531.
Pandolfi, F., Edwards, S.A., Maes, D., Kyriazakis, I., 2018. Connecting different data sources to assess the interconnections between biosecurity, health, welfare, and performance in commercial pig farms in Great Britain. Frontiers in Veterinary Science 5, 1-13.
Pandolfi, F., Kyriazakis, I., Stoddart, K., Wainwright, N., Edwards, S.A., 2017. The “Real Welfare” scheme: Identification of risk and protective factors for welfare outcomes in commercial pig farms in the UK. Preventive Veterinary Medicine 146, 34-43.
Paoli , M . A ., Lahrmann , H . P ., Jensen , T . and D ’ Eath , R . B . (2016 ) Behavioural differences between weaner pigs with intact and Copyright © 2016 Universities Federation for Animal Welfare . This manuscript version is made available after the 287-296.
Sandercock, D.A., Barnett, M.W., Coe, J.E., Downing, A.C., Nirmal, A.J., Di Giminiani, P., Edwards, S.A., Freeman, T.C., 2019. Transcriptomics Analysis of Porcine Caudal Dorsal Root Ganglia in Tail Amputated Pigs Shows Long-Term Effects on Many Pain-Associated Genes. Frontiers in Veterinary Science 6.
Sandercock, D.A., Smith, S.H., Di Giminiani, P., Edwards, S.A., 2016. Histopathological Characterization of Tail Injury and Traumatic Neuroma Development after Tail Docking in Piglets. Journal of Comparative Pathology 155, 40-49.
Schrøder-Petersen, D.L., Simonsen, H.B., 2001. Tail biting in pigs. The Veterinary Journal 162, 196-210.
Schmitt, O., O’Driscoll, K., Boyle, L.A., Baxter, E.M., 2019. Artificial rearing affects piglets pre-weaning behaviour, welfare and growth performance. Applied Animal Behaviour Science 210, 16-25.
Scollo, A., Contiero, B., Gottardo, F., 2016. Frequency of tail lesions and risk factors for tail biting in heavy pig production from weaning to 170 kg live weight. Veterinary Journal 207, 92-98.
Scollo, A., Di Martino, G., Bonfanti, L., Stefani, A.L., Schiavon, E., Marangon, S., Gottardo, F., 2013. Tail docking and the rearing of heavy pigs: The role played by gender and the presence of straw in the control of tail biting. Blood parameters, behaviour and skin lesions. Research in Veterinary Science 95, 825-830.
Scollo, A., Gottardo, F., Contiero, B., Edwards, S.A., 2017. A cross-sectional study for predicting tail biting risk in pig farms using classification and regression tree analysis. Preventive Veterinary Medicine 146, 114-120.
Scott, K., Taylor, L., Gill, B.P., Edwards, S.A., 2009. Influence of different types of environmental enrichment on the behaviour of finishing pigs in two different housing systems. 3. Hanging toy versus rootable toy of the same material. Applied Animal Behaviour Science 116, 186-190.
Simonsen, H.B., Klinken, L., Bindseil, E., 1991. Histopathology of intact and docked pigtails. British Veterinary Journal 147, 407-412.
Sinisalo, A., Niemi, J.K., Heinonen, M., Valros, A., 2012. Tail biting and production performance in fattening pigs. Livestock Science 143, 220-225.
Spooner, J.M., Schuppli, C.A., Fraser, D., 2014. Attitudes of Canadian Pig Producers Toward Animal Welfare. Journal of Agricultural and Environmental Ethics 27, 569-589.
Statham, P., Green, L., Bichard, M., Mendl, M., 2009. Predicting tail-biting from behaviour of pigs prior to outbreaks. Applied Animal Behaviour Science 121, 157-164.
Sutherland, M.A., Tucker, C.B., 2011. The long and short of it: A review of tail docking in farm animals. Applied Animal Behaviour Science 135, 179-191.
Taylor, N.R., Main, D.C.J., Mendl, M., Edwards, S.A., 2010. Tail-biting: A new perspective. Veterinary Journal 186, 137-147.
Teixeira, D.L., Harley, S., Hanlon, A., O’Connell, N.E., More, S.J., Manzanilla, E.G., Boyle, L.A., 2016. Study on the association between tail lesion score, cold carcass weight, and viscera condemnations in slaughter pigs. Frontiers in Veterinary Science 3, 1-7.
Telkänranta, H., Bracke, M.B.M., Valros, A., 2014. Fresh wood reduces tail and ear biting and increases exploratory behaviour in finishing pigs. Applied Animal Behaviour Science 161, 51-59.
Thodberg, K., Herskin, M.S., Jensen, T., Jensen, K.H., 2018. The effect of docking length on the risk of tail biting, tail-directed behaviour, aggression and activity level of growing pigs kept under commercial conditions. Animal 12, 2609-2618.
Trickett, S.L., Guy, J.H., Edwards, S.A., 2009. The role of novelty in environmental enrichment for the weaned pig. Applied Animal Behaviour Science 116, 45-51.
Ursinus, Winanda W., Van Reenen, C.G., Kemp, B., Bolhuis, J.E., 2014a. Tail biting behaviour and tail damage in pigs and the relationship with general behaviour: Predicting the inevitable? Applied Animal Behaviour Science 156, 22-36.
Ursinus, Winanda W., Van Reenen, C.G., Reimert, I., Bolhuis, J.E., 2014b. Tail biting in pigs: Blood serotonin and fearfulness as pieces of the puzzle? PLoS ONE 9.
Ursinus, W. W., Wijnen, H.J., Bartel, A.C., Dijvesteijn, N., van Reenen, C.G., Bolhuis, J.E., 2014c. Damaging biting behaviors in intensively kept rearing gilts: The effect of jute sacks and relations with production characteristics. Journal of Animal Science 92, 5193-5202.
Valros, A., 2017. Tail biting. Advances in Pig Welfare 137-166.
Valros, A., Ahlström, S., Rintala, H., Häkkinen, T., Saloniemi, H., 2004. The prevalence of tail damage in slaughter pigs in Finland and associations to carcass condemnations. Acta Agriculturae Scandinavica - Section A: Animal Science 54, 213-219.
Valros, A., Barber, C., 2019. Producer perceptions of the prevention of tail biting on UK farms: Association to bedding use and tail removal proportion. Animals 9, 1-21.
Valros, A., Heinonen, M., 2015. Save the pig tail. Porcine Health Management 1, 1-7.
Valros, A., Munsterhjelm, C., Hänninen, L., Kauppinen, T., Heinonen, M., 2016. Managing undocked pigs - on-farm prevention of tail biting and attitudes towards tail biting and docking. Porcine Health Management 2, 1-11.
Valros, A., Munsterhjelm, C., Puolanne, E., Ruusunen, M., Heinonen, M., Peltoniemi, O.A.T., Pösö, A.R., 2013. Physiological indicators of stress and meat and carcass characteristics in tail bitten slaughter pigs. Acta Veterinaria Scandinavica 55, 1.
Valros, A., Palander, P., Heinonen, M., Munsterhjelm, C., Brunberg, E., Keeling, L., Piepponen, P., 2015. Evidence for a link between tail biting and central monoamine metabolism in pigs (Sus scrofa domestica). Physiology and Behavior 143, 151-157.
Van de Weerd, H.A., Day, J.E.L., 2009. A review of environmental enrichment for pigs housed in intensive housing systems. Applied Animal Behaviour Science 116, 1-20.
Van De Weerd, H.A., Docking, C.M., Day, J.E.L., Edwards, S.A., 2005. The development of harmful social behaviour in pigs with intact tails and different enrichment backgrounds in two housing systems. Animal Science 80, 289-298.
Van Der Meer, Y., Gerrits, W.J.J., Jansman, A.J.M., Kemp, B., Bolhuis, J.E., 2017. A link between damaging behaviour in pigs, sanitary conditions, and dietary protein and amino acid supply. PLoS ONE 12, 1-21.
van Putten, G., 1969. An investigation into tail-biting among fattening pigs. The British veterinary journal 125, 511-514.
Van Staaveren, N., Calderón Díaz, J.A., Garcia Manzanilla, E., Hanlon, A., Boyle, L.A., 2018. Prevalence of welfare outcomes in the weaner and finisher stages of the production cycle on 31 Irish pig farms. Irish Veterinary Journal 71, 1-9.
Van Staaveren, N., Doyle, B., Manzanilla, E.G., Calderón Díaz, J.A., Hanlon, A., Boyle, L.A., 2017a. Validation of carcass lesions as indicators for on-farm health and welfare of pigs. Journal of Animal Science 95, 1528-1536.
Van Staaveren, N., Teixeira, D.L., Hanlon, A., Boyle, L.A., 2017b. Pig carcass tail lesions: The influence of record keeping through an advisory service and the relationship with farm performance parameters. Animal 11, 140-146.
Van Staaveren, N., Vale, A.P., Manzanilla, E.G., Teixeira, D.L., Leonard, F.C., Hanlon, A., Boyle, L.A., 2016. Relationship between tail lesions and lung health in slaughter pigs. Preventive Veterinary Medicine 127, 21-26.
Veit, C., Büttner, K., Traulsen, I., Gertz, M., Hasler, M., Burfeind, O., Beilage, E. grosse, Krieter, J., 2017. The effect of mixing piglets after weaning on the occurrence of tail-biting during rearing. Livestock Science 201, 70-73.
Vermeer, H.M., Dirx-Kuijken, N.C.P.M.M., Bracke, M.B.M., 2017. Exploration feeding and higher space allocation improve welfare of growing-finishing pigs. Animals 7, 3-11.
Vom Brocke, A.L., Karnholz, C., Madey-Rindermann, D., Gauly, M., Leeb, C., Winckler, C., Schrader, L., Dippel, S., 2019. Tail lesions in fattening pigs: Relationships with postmortem meat inspection and influence of a tail biting management tool. Animal 13, 835-844.
Wallenbeck, A., Keeling, L.J., 2013. Using data from electronic feeders on visit frequency and feed consumption to indicate tail biting outbreaks in commercial pig production. Journal of Animal Science 91, 2879-2884.
Wallgren, T., Larsen, A., Gunnarsson, S., 2019a. Tail posture as an indicator of tail biting in undocked finishing pigs. Animals 9.
Wallgren, T., Larsen, A., Lundeheim, N., Westin, R., Gunnarsson, S., 2019b. Implication and impact of straw provision on behaviour, lesions and pen hygiene on commercial farms rearing undocked pigs. Applied Animal Behaviour Science 210, 26-37.
Wallgren, T., Lundeheim, N., Wallenbeck, A., Westin, R., Gunnarsson, S., 2019c. Rearing pigs with intact tails-experiences and practical solutions in Sweden. Animals 9. https://doi.org/10.3390/ani9100812.
Wedin, M., Baxter, E.M., Jack, M., Futro, A., D’Eath, R.B., 2018. Early indicators of tail biting outbreaks in pigs. Applied Animal Behaviour Science 208, 7-13.
Zhang, L., Gray, H., Ye, X., Collins, L., Allinson, N., 2019. Automatic individual pig detection and tracking in surveillance videos. Sensors.
Zonderland, J.J., Bracke, M.B.M., den Hartog, L.A., Kemp, B., Spoolder, H.A.M., 2010. Gender effects on tail damage development in singleor mixed-sex groups of weaned piglets. Livestock Science 129, 151-158.
Zonderland, J.J., Kemp, B., Bracke, M.B.M., Den Hartog, L.A., Spoolder, H.A.M., 2011a. Individual piglets contribution to the development of tail biting. Animal 5, 601-607.
Zonderland, J.J., Schepers, F., Bracke, M.B.M., Den Hartog, L.A., Kemp, B., Spoolder, H.A.M., 2011b. Characteristics of biter and victim piglets apparent before a tail-biting outbreak. Animal 5, 767-775.
Zonderland, J.J., van Riel, J.W., Bracke, M.B.M., Kemp, B., den Hartog, L.A., Spoolder, H.A.M., 2009. Tail posture predicts tail damage among weaned piglets. Applied Animal Behaviour Science 121, 165-
Zonderland, J.J., Wolthuis-Fillerup, M., van Reenen, C.G., Bracke, M.B.M., Kemp, B., Hartog, L.A. de., Spoolder, H.A.M., 2008. Prevention and treatment of tail biting in weaned piglets. Applied Animal
Behaviour Science 110, 269-281.
Zonderland J.j., Bosma B., Hoste R. 2011c Financiële consequenties van staartbijten bij varkens Wageningen UR Livestock Research, onderdeel van Stichting Dienst Landbouwkundig Onderzoek, 2011
Zonderland, J.J., Zonderland-Thomassen, M.A., 2016. Behavioural change by pig producers is the key factor in raising pigs with intact tails. Veterinary Journal 211, 1-2.
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