References
- ApplebyM.C. 2005 Welfare challenges in sow housing J. Am. Vet. Med. Assoc 226 1334 1336
- BalleriniA. CivitarealeC. FioriM. ReginiM. BettiM. BrambillaG. 2003 Traceability of inbred and crossbred Cinta Senese pigs by evaluating the oxidative stress J. Vet. Med 50 113 116
- BartaV. BartaO. 1993 Testing of Hemolitic Complement and its components BartaO. Veterinary clinical immunology laboratory Bar-Lab Publ. Blacksburg, VA, USA Chapter 6 1 40
- BeattieV.E. O'ConnellN.E. KilpatrickD.J. MossB.W. 2000 Influence of environmental enrichment on welfare-related behavioural and physiological parameters in growing pigs Anim. Sci 70 443 450
- BeattieV.E. WalkerN. SneddonI.A. 1995 Effects of environmental enrichment on behaviour and productivity of growing pigs Anim. Welfare 4 207 220
- BeuerleW. 1975 Field observations on aggressive and sexual behavior of the european wild swine (Sus scrofa l.) Z. Tierpsychol 39 211 258
- BlechaF. PollmannD.S. NicholsD.A. 1985 Immunologic reactions of pigs regrouped at or near weaning Am. J. Vet. Res 46 1934 1937
- BrambillaG. CivitarealeC. BalleriniA. FioriM. AmadoriM. ArchettiL.I. ReginiM. BettiM. 2002 Response to oxidative stress as a welfare parameter in swine Redox Rep 7 159 163
- BrenesJ.C. FornagueraJ. 2008 Effects of environmental enrichment and social isolation on sucrose consumption and preference: Associations with depressive-like behavior and ventral striatum dopamine Neurosci. Lett 436 278 282
- BroomD.M. 1986 Indicators of poor welfare Brit. Vet. J 142 524 526
- BroomD.M. 1996 A review of animal welfare measurement in pigs Pigs News and Information 1 109N 114N
- BroomD.M. JohnsonK.G. 1993 Stress and animal welfare Animal Behaviour Series Kluwer Academic Publ. Dordrecht, The Netherlands
- CandianiD. SalamanoG. MelliaE. DoglioneL. BrunoR. ToussaintM. GruysE. 2008 A combination of behavioural and physiological indicators for assessing pig welfare on the farm J. Appl. Anim. Welf. Sci 11 1 13
- DayJ.E.L. KyriazakisI. LawrenceA.B. 1996 An investigation into the causation of chewing behaviour in growing pigs: The role of exploration and feeding motivation Appl. Anim. Behav. Sci 48 47 59
- DayJ.E.L. SpoolderH.A.M. BurfootA. ChamberlainH.L. EdwardsS.A. 2002 The separate and interactive effects of handling and environmental enrichment on the behaviour and welfare of growing pigs Appl. Anim. Behav. Sci 75 177 192
- de JongI.C. EkkelE.D. van de BurgwalJ.A. LambooijE. KorteS.M. RuisM.A.W. KoolhaasJ.M. BlokhuisH.J. 1998 Effects of strawbedding on physiological responses to stressors and behaviour in growing pigs Physiol. Behav 64 303 310
- de KoningR. 1984 Injuries in confined sows: incidence and relation with behaviour Ann. Rech. Vet 15 205 214
- DeenJ. AnilS.S. AnilL. 2005 Sow housing: opportunities, constraints, and unknowns J. Am. Vet. Med. Assoc 226 1331 1334
- Department for Environment, Food and Rural Affairs 2003 Code of Recommendations for Welfare of Livestock: Pigs Defra Publ. London, UK
- DongS. LiC. WuP. TsienJ.Z. HuY. 2007 Environment enrichment rescues the neurodegenerative phenotypes in presenilinsdeficient mice Eur. J. Neurosci 26 101 112
- EdwardsA.L. 1985 Experimental design in psychological research Harper & Row New York, NY, USA
- European Commission 2008 Directive No. 120 of 18 February 2009 laying down minimum standards for the protection of pigs Official Journal, L 47, 18/02/2009 5 13
- EvansE.W. 2006 Interpretation of Porcine Leukocyte Responses FeldmanB.F. ZinklJ.G. JainN.C. Schalm's Veterinary Hematology 5th ed Blackwell Publ. Oxford, UK 411 416
- FraserD. 1995 Science, values and animal welfare: exploring the “inextricable connection” Anim. Welfare 4 103 117
- FraserD. BroomD.M. 1990 Farm animal behaviour and welfare 3rd ed Bailliere Tindall Publ. London, UK
- GonyouH.W. BeltranenaE. WhittingtonD.L. PatienceJ.F. 1998 The behaviour of pigs weaned at 12 and 21 days of age from weaning to market Can. J. Anim. Sci 78 517 523
- GrandinT. CurtisS.E. 1984 Toy preferences in young pigs J. Anim. Sci 59 85 85 (abstr.)
- GravesH.B. 1984 Behavior and ecology of wild and feral swine (sus scrofa) J. Anim. Sci 58 482 492
- GuyJ.H. RowlinsonP. ChadwickJ.P. EllisM. 2002 Behaviour of two genotypes of growing-finishing pigs in three different housing systems Appl. Anim. Behav. Sci 75 193 206
- HillJ.D. McGloneJ.J. FullwoodS.D. MillerM.F. 1998 Environmental enrichment influences on pig behavior, performance and meat quality Appl. Anim. Behav. Sci 57 51 68
- HodgkissN.J. EddisonJ.C. BrooksP.H. BuggP. 1998 Assessment of the injuries sustained by pregnant sows housed in groups using electronic feeders Vet. Rec 143 604 607
- HorrellI. NessP.A. 1995 Enrichment satisfying specific behavioural needs in earlyweaned pigs Appl. Anim. Behav. Sci 44 264 (abstr.)
- JensenP. 1980 An ethogram of social interaction patterns in group-housed dry sows Appl. Anim. Ethol 6 341 350
- JensenP. ToatesF.M. 1993 Who needs “behavioural needs”? Motivational aspects of the needs of animals Appl. Anim. Behav. Sci 37 161 181
- KellyH.R.C. BruceJ.M. EnglishP.R. FowlerV.R. EdwardsS.A. 2000 Behaviour of 3-week weaned pigs in straw-flow, deep straw and flat deck housing systems Appl. Anim. Behav. Sci 68 269 280
- KlontR.E. HulseggeB. Hoving-BolinkA.H. GerritzenM.A. KurtE. Winkelman-GoedhartH.A. de JongI.C. KranenR.W. 2001 Relationships between behavioral and meat quality characteristics of pigs raised under barren and enriched housing conditions J. Anim. Sci 79 2835 2843
- LAREF 2008 Discussions by the Laboratory Animal Refinement and Enrichment Forum Available from: http://groups.yahoo.com/group/LAREF/
- LaviolaG. ReaM. Morley-FletcherS. Di CarloS. BacosiA. De SimoneR. BertiniM. PacificiR. 2004 Beneficial effects of enriched environment on adolescent rats from stressed pregnancies Eur. J. Neurosci 20 1655 1664
- LawrenceA.B. TerlouwE.M. 1993 A review of behavioral factors involved in the development and continued performance of stereotypic behaviors in pigs J. Anim. Sci 71 2815 2825
- MartinP. BatesonP. 1993 Measuring behaviour An introductory guide 2nd ed Cambridge University Press Cambridge, UK
- McGloneJ.J. 1986 Agonistic behavior in food animals: Review of research and techniques J. Anim. Sci 62 1130 1139
- MellorD.J. StaffordK.J. 2001 Integrating practical, regulatory and ethical strategies for enhancing farm animal welfare Austral. Vet. J 79 762 768
- MooreA.S. GonyouH.W. WhittingtonD.L. BeltranenaE. RhodesC.S. Van KesselA.G. 1994 Effect of group composition and pen size on behaviour, productivity, and immune response of growing pigs Appl. Anim. Behav. Sci 40 13 30
- National Pork Board 2003 Swine Welfare Assurance Program Available from: http://www.thepigsite.com/articles/dis-play=939MHTML Accessed 15/5/2009
- NemiC.J. 1993 Essential of Veterinary Hematology Lea & Febiger Philadelphia, PA, USA
- OlsenA.W. SimonsenH.B. DybkjaerL. 2002 Effect of access to roughage and shelter on selected behavioural indicators of welfare pigs housed in complex environment Anim. Welfare 11 75 87
- OssermanE.F. LawlorD.P. 1966 Serum and urinary lysozyme (muramidase) in monocytic and monomyelocytic leukemia J. Exp. Med 124 921 952
- PallarésF.J. Martínez-SubielaS. SevaJ. RamisG. FuentesP. BernabéA. MuñozA. CerónJ.J. 2008 Relationship between serum acute phase protein concentrations and lesions in finishing pigs Vet. J 177 369 373
- PetersenV. SimonsenH.B. LawsonL.G. 1995 The effect of environmental stimulation on the development of behaviour in pigs Appl. Anim. Behav. Sci 45 215 224
- SAS 2001 Statview 5.0 SAS Inst. Inc. Cary, NC, USA
- ScottK. TaylorL. BhupinderP.G. EdwardsS.A. 2006 Influence of different types of environmental enrichment on the behaviour of finishing pigs in two different housing systems: Hanging toy versus rootable substrate Appl. Anim. Behav. Sci 99 222 229
- SmuldersD. VerbekebG. MormèdecP. GeersaR. 2006 Validation of a behavioral observation tool to assess pig welfare Physiol. Behav 89 438 447
- StaffordK. GregoryN. 2008 Implications of intensification of pastoral animal production on animal welfare New Zeal. Vet. J 56 274 280
- StolbaA. Wood-GushD.G.M. 1984 The identification of behavioral key features and their incorporation into a housing design for pigs Ann. Rech. Vet 15 287 298
- StookeyJ.M. GonyouH.W. 1994 The effects of regrouping on behavioral and production parameters in finishing swine J. Anim. Sci 72 2804 2811
- StudnitzM. JensenM.B. PedersenL.J. 2007 Why do pigs root and in what will they root? A review on the exploratory behaviour of pigs in relation to environmental enrichment Appl. Anim. Behav. Sci 107 183 197
- TanS.S.L. ShackletonD.M. BeamesR.M. 1991 The effects of mixing unfamiliar individuals on the growth and production of finishing pigs Anim. Prod 52 201 206
- Van de WeerdH.A. DockingC.M. DayJ.E.L. AveryP.J. EdwardsS.A. 2003 A systematic approach towards developing environmental enrichment for pigs Appl. Anim. Behav. Sci 84 101 118
- Van de WeerdH.A. DockingC.M. DayJ.E.L. BreuerK. EdwardsS.A. 2006 Effects of species-relevant environmental enrichment on the behaviour and productivity of finishing pigs Appl. Anim. Behav. Sci 99 230 247
- WiepkemaP.R. KoolhaasJ. 1993 Stress and animal welfare Anim. Welfare 2 195 218
- WorobecE.K. DuncanI.J.H. 1999 The effects of weaning at 7, 14 and 28 days on piglet behaviour Appl. Anim. Behav. Sci 62 173 182
- ZanellaA.J. BroomD.M. MendlM. 1991 Responses to housing conditions and immunological state in sows Anim. Prod 52 579 (abstr.)