Analyze Diet
Animals : an open access journal from MDPI2023; 13(4); 612; doi: 10.3390/ani13040612

The Reporting of Racehorse Fatalities in New Zealand Thoroughbred Flat Racing in the 2011/12-2021/22 Seasons.

Abstract: Race day fatalities as a consequence of catastrophic musculoskeletal injury and cardiac failure are both a welfare concern and provide a challenge for the social perceptions of equine welfare within the racing industry. To reduce race day fatalities, the risk factors under New Zealand racing conditions need to be identified. The aim of this study was to examine race and horse-level risk factors for fatalities in New Zealand Thoroughbred flat racing using retrospective race day data from the 2011/12-2021/22 racing seasons. Horse and race-level factors associated with a suspected cardiac failure and fatal fracture were identified by merging fatality data with the master race dataset for the corresponding seasons. Most fatalities were associated with fatal fracture (0.4 per 1000 starts, 95% CI 0.4-0.5). Horses which raced over distances > 1600 m were 1.7 times (95% CI 1.2-2.5) more likely to sustain a fatal fracture than horses racing ≤ 1600 m. Male horses and firmer track conditions were also associated with an increase in the risk of fatal fracture. Horses aged 5 years and older were 2.1 (95% CI 1.1-4.6) times more likely to suffer a suspected cardiac failure than younger horses. Changes in the industry reporting system improved the level of detail provided for fatalities, enabling the identification of specific risk factors.
Publication Date: 2023-02-09 PubMed ID: 36830402PubMed Central: PMC9951738DOI: 10.3390/ani13040612Google Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research paper investigates the factors contributing to racehorse fatalities in New Zealand’s thoroughbred flat racing industry. The study uses past data from racing seasons spanning 2011/12 to 2021/22 to establish a connection between certain horse and race-related elements and fatal incidents like fractures and cardiac failures.

Study Aim and Methodology

  • The main goal of this study was to understand and characterize the risk factors connected with horse race day fatalities.
  • The researchers undertook a retrospective analysis of race day data from the 2011/12 to 2021/22 seasons.
  • This data was combined with fatality data for the corresponding seasons to pinpoint horse and race-specific factors associated with lethal fractures and suspected cardiac failures.

Key Findings

  • The majority of fatalities were linked to fatal fractures with a fatality rate of 0.4 per 1000 starts.
  • Horses that raced over distances greater than 1600 meters were 1.7 times more likely to sustain a fatal fracture compared to those racing at or below 1600 meters.
  • Male horses and races held on firmer tracks were identified as having an elevated risk for fatal fractures.
  • Horses aged 5 years and above were 2.1 times more likely to suffer an apparent cardiac failure in comparison to younger horses.

Implications of the Study

  • The study provides valuable insights that can help the racing industry better understand and manage the risks contributing to racehorse fatalities.
  • The recent advancements in reporting systems for the industry have enhanced the depth of detail provided for fatalities, thereby facilitating the identification of more specific risk factors, which can lead to more effective preventive strategies.

Cite This Article

APA
Gibson MJ, Legg KA, Gee EK, Rogers CW. (2023). The Reporting of Racehorse Fatalities in New Zealand Thoroughbred Flat Racing in the 2011/12-2021/22 Seasons. Animals (Basel), 13(4), 612. https://doi.org/10.3390/ani13040612

Publication

ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 13
Issue: 4
PII: 612

Researcher Affiliations

Gibson, Michaela J
  • School of Veterinary Sciences, Massey University, Palmerston North 4442, New Zealand.
Legg, Kylie A
  • School of Veterinary Sciences, Massey University, Palmerston North 4442, New Zealand.
Gee, Erica K
  • School of Veterinary Sciences, Massey University, Palmerston North 4442, New Zealand.
Rogers, Chris W
  • School of Veterinary Sciences, Massey University, Palmerston North 4442, New Zealand.
  • School of Agriculture and Environment, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand.

Grant Funding

  • 9/2017 / The New Zealand Equine Trust

Conflict of Interest Statement

The authors declare no real or perceived conflict of interest.

References

This article includes 33 references
  1. Heleski C, Stowe CJ, Fiedler J, Peterson ML, Brady C, Wickens C, MacLeod JN. Thoroughbred Racehorse Welfare through the Lens of ‘Social License to Operate—With an Emphasis on a US Perspective. Sustainability 2020;12:1706.
  2. Nath L, Stent A, Elliott A, La Gerche A, Franklin S. Risk Factors for Exercise-Associated Sudden Cardiac Death in Thoroughbred Racehorses.. Animals (Basel) 2022 May 18;12(10).
    doi: 10.3390/ani12101297pmc: PMC9137751pubmed: 35625143google scholar: lookup
  3. Hitchens PL, Morrice-West AV, Stevenson MA, Whitton RC. Meta-analysis of risk factors for racehorse catastrophic musculoskeletal injury in flat racing.. Vet J 2019 Mar;245:29-40.
    doi: 10.1016/j.tvjl.2018.11.014pubmed: 30819423google scholar: lookup
  4. Boden LA, Anderson GA, Charles JA, Morgan KL, Morton JM, Parkin TD, Clarke AF, Slocombe RF. Risk factors for Thoroughbred racehorse fatality in flat starts in Victoria, Australia (1989-2004).. Equine Vet J 2007 Sep;39(5):430-7.
    doi: 10.2746/042516407X183162pubmed: 17910268google scholar: lookup
  5. Rosanowski SM, Chang YM, Stirk AJ, Verheyen KLP. Risk factors for race-day fatality in flat racing Thoroughbreds in Great Britain (2000 to 2013).. PLoS One 2018;13(3):e0194299.
  6. Georgopoulos SP, Parkin TD. Risk factors associated with fatal injuries in Thoroughbred racehorses competing in flat racing in the United States and Canada.. J Am Vet Med Assoc 2016 Oct 15;249(8):931-939.
    pubmed: 27700272doi: 10.2460/javma.249.8.931google scholar: lookup
  7. Bolwell C, Rogers C, Gee E, McIlwraith W. Epidemiology of Musculoskeletal Injury during Racing on New Zealand Racetracks 2005-2011.. Animals (Basel) 2017 Aug 11;7(8).
    pmc: PMC5575574pubmed: 28800064doi: 10.3390/ani7080062google scholar: lookup
  8. Bolwell C, Rogers C, Gee E. Descriptive epidemiology of race-day jockey falls and injuries in New Zealand. Comp. Exerc. Physiol. 2014;10:49–55.
    doi: 10.3920/CEP13036google scholar: lookup
  9. Gibson MJ, Bolwell CF, Gee EK, Legg KA, Rogers CW. Race-Level Reporting of Incidents during Two Seasons (2015/16 to 2016/17) of Thoroughbred Flat Racing in New Zealand.. Animals (Basel) 2022 Apr 15;12(8).
    doi: 10.3390/ani12081033pmc: PMC9029521pubmed: 35454278google scholar: lookup
  10. Gibson MJ, Legg KA, Gee EK, Rogers CW. Race-Level Reporting of Incidents Using an Online System during Three Seasons (2019/2020-2021/2022) of Thoroughbred Flat Racing in New Zealand.. Animals (Basel) 2022 Nov 3;12(21).
    pmc: PMC9658589pubmed: 36359152doi: 10.3390/ani12213028google scholar: lookup
  11. Legg KA, Gee EK, Cochrane DJ, Rogers CW. Preliminary Examination of the Biological and Industry Constraints on the Structure and Pattern of Thoroughbred Racing in New Zealand over Thirteen Seasons: 2005/06-2017/18.. Animals (Basel) 2021 Sep 27;11(10).
    doi: 10.3390/ani11102807pmc: PMC8532836pubmed: 34679829google scholar: lookup
  12. Parkin TD. Epidemiology of racetrack injuries in racehorses.. Vet Clin North Am Equine Pract 2008 Apr;24(1):1-19.
    pubmed: 18314033doi: 10.1016/j.cveq.2007.11.003google scholar: lookup
  13. Hitchens PL, Hill AE, Stover SM. The role of catastrophic injury or sudden death of the horse in race-day jockey falls and injuries in California, 2007-2012.. Equine Vet J 2016 Jan;48(1):50-6.
    pubmed: 25417895doi: 10.1111/evj.12392google scholar: lookup
  14. Physick-Sheard P, Avison A, Sears W. Factors Associated with Mortality in Ontario Standardbred Racing: 2003-2015.. Animals (Basel) 2021 Apr 5;11(4).
    pmc: PMC8066029pubmed: 33916415doi: 10.3390/ani11041028google scholar: lookup
  15. Morrice-West AV, Hitchens PL, Walmsley EA, Stevenson MA, Whitton RC. Training practices, speed and distances undertaken by Thoroughbred racehorses in Victoria, Australia.. Equine Vet J 2020 Mar;52(2):273-280.
    doi: 10.1111/evj.13156pubmed: 31386764google scholar: lookup
  16. Rosanowski SM, Chang YM, Stirk AJ, Verheyen KL. Descriptive epidemiology of veterinary events in flat racing Thoroughbreds in Great Britain (2000 to 2013).. Equine Vet J 2017 May;49(3):275-281.
    doi: 10.1111/evj.12592pubmed: 27208544google scholar: lookup
  17. Boden LA, Anderson GA, Charles JA, Morgan KL, Morton JM, Parkin TD, Slocombe RF, Clarke AF. Risk of fatality and causes of death of Thoroughbred horses associated with racing in Victoria, Australia: 1989-2004.. Equine Vet J 2006 Jul;38(4):312-8.
    pubmed: 16866197doi: 10.2746/042516406777749182google scholar: lookup
  18. Lyle CH, Uzal FA, McGorum BC, Aida H, Blissitt KJ, Case JT, Charles JT, Gardner I, Horadagoda N, Kusano K, Lam K, Pack JD, Parkin TD, Slocombe RF, Stewart BD, Boden LA. Sudden death in racing Thoroughbred horses: an international multicentre study of post mortem findings.. Equine Vet J 2011 May;43(3):324-31.
  19. Lyle CH, Blissitt KJ, Kennedy RN, Mc Gorum BC, Newton JR, Parkin TD, Stirk A, Boden LA. Risk factors for race-associated sudden death in Thoroughbred racehorses in the UK (2000-2007).. Equine Vet J 2012 Jul;44(4):459-65.
  20. Verheyen KL, Wood JL. Descriptive epidemiology of fractures occurring in British Thoroughbred racehorses in training.. Equine Vet J 2004 Mar;36(2):167-73.
    pubmed: 15038441doi: 10.2746/0425164044868684google scholar: lookup
  21. Wylie CE, McManus P, McDonald C, Jorgensen S, McGreevy P. Thoroughbred fatality and associated jockey falls and injuries in races in New South Wales and the Australian Capital Territory, Australia: 2009-2014.. Vet J 2017 Sep;227:1-7.
    pubmed: 29031324doi: 10.1016/j.tvjl.2017.06.008google scholar: lookup
  22. Sun TC, Riggs CM, Cogger N, Wright J, Al-Alawneh JI. Noncatastrophic and catastrophic fractures in racing Thoroughbreds at the Hong Kong Jockey Club.. Equine Vet J 2019 Jan;51(1):77-82.
    pubmed: 29672909doi: 10.1111/evj.12953google scholar: lookup
  23. Rosanowski SM, Chang YM, Stirk AJ, Verheyen KLP. Epidemiology of race-day distal limb fracture in flat racing Thoroughbreds in Great Britain (2000-2013).. Equine Vet J 2019 Jan;51(1):83-89.
    pubmed: 29806972doi: 10.1111/evj.12968google scholar: lookup
  24. Martig S, Chen W, Lee PV, Whitton RC. Bone fatigue and its implications for injuries in racehorses.. Equine Vet J 2014 Jul;46(4):408-15.
    pubmed: 24528139doi: 10.1111/evj.12241google scholar: lookup
  25. Parkin TD, Clegg PD, French NP, Proudman CJ, Riggs CM, Singer ER, Webbon PM, Morgan KL. Race- and course-level risk factors for fatal distal limb fracture in racing Thoroughbreds.. Equine Vet J 2004 Sep;36(6):521-6.
    pubmed: 15460077doi: 10.2746/0425164044877332google scholar: lookup
  26. Rogers CW, Bolwell CF, Gee EK, Peterson ML, McIlwraith CW. Profile and surface conditions of New Zealand thoroughbred racetracks. J. Equine Vet. Sci. 2014;34:1105–1109.
  27. Tanner J, Rogers C, Bolwell C, Cogger N, Gee E, Mcllwraith W. Analysis of Failure to Finish a Race in a Cohort of Thoroughbred Racehorses in New Zealand.. Animals (Basel) 2016 May 25;6(6).
    doi: 10.3390/ani6060036pmc: PMC4929416pubmed: 27231944google scholar: lookup
  28. Perkins NR, Reid SW, Morris RS. Profiling the New Zealand Thoroughbred racing industry. 1. Training, racing and general health patterns.. N Z Vet J 2005 Feb;53(1):59-68.
    pubmed: 15731836doi: 10.1080/00480169.2005.36470google scholar: lookup
  29. Chin YY, Rogers CW, Gee EK, Stafford KJ, Cameron EZ. The pattern of breeding and management within the New Zealand Thoroughbred breeding industry 2005–2015. 1. The stallion population. Anim. Prod. Sci. 2022.
    doi: 10.1071/AN21388google scholar: lookup
  30. Legg K, Cochrane D, Gee E, Rogers C. The External Workload of Thoroughbred Horse Racing Jockeys. Sustainability 2020;12:7572.
  31. Whitton RC, Jackson MA, Campbell AJ, Anderson GA, Parkin TD, Morton JM, Boden LA. Musculoskeletal injury rates in Thoroughbred racehorses following local corticosteroid injection.. Vet J 2014 Apr;200(1):71-6.
    pubmed: 24690214doi: 10.1016/j.tvjl.2013.09.003google scholar: lookup
  32. International Federation of Horse Racing Authorities . IFHRA Annual Report 2019. International Federation of Horse Racing Authorities; Boulogne, France: 2019.
  33. Molesan A, Wang M, Sun Q, Pierce V, Desideri R, Palmer S, Todhunter R, Kelly K. Cardiac Pathology and Genomics of Sudden Death in Racehorses From New York and Maryland Racetracks.. Vet Pathol 2019 Jul;56(4):576-585.
    doi: 10.1177/0300985819829529pubmed: 30917748google scholar: lookup

Citations

This article has been cited 6 times.
  1. Pan M, Malekipour F, Pivonka P, Morrice-West AV, Flegg JA, Whitton RC, Hitchens PL. A mathematical model of metacarpal subchondral bone adaptation, microdamage and repair in racehorses. J R Soc Interface 2025 Oct;22(231):20250297.
    doi: 10.1098/rsif.2025.0297pubmed: 41027486google scholar: lookup
  2. Avison A, Goderre BG, Pyle WG, Physick-Sheard PW. QT Interval and Cardiac Restitution Ratio Complexity in Standardbred Racehorses From Rest to Maximal Effort: Insights Into Arrhythmia Risk. J Vet Intern Med 2025 Sep-Oct;39(5):e70207.
    doi: 10.1111/jvim.70207pubmed: 40926462google scholar: lookup
  3. Samy A, Elsherif HMR. Influence of nano silicon dioxide from sand and rice straw ash on broiler productivity, antioxidant status and bone quality. Sci Rep 2025 Jul 7;15(1):24259.
    doi: 10.1038/s41598-025-07972-wpubmed: 40624116google scholar: lookup
  4. Avison A, Physick-Sheard PW, Pyle WG. Performance horses as a model for exercise-associated cardiac arrhythmias and sudden cardiac death. J Mol Cell Cardiol Plus 2025 Jun;12:100452.
    doi: 10.1016/j.jmccpl.2025.100452pubmed: 40475708google scholar: lookup
  5. Jeppesen A, Eyers R, Evans D, Ward MP, Quain A. Comparison of Reported Fatalities, Falls and Injuries in Thoroughbred Horse Jumps and Flat Races in the 2022 and 2023 Jumps Race Seasons in Victoria, Australia. Animals (Basel) 2024 Mar 5;14(5).
    doi: 10.3390/ani14050804pubmed: 38473189google scholar: lookup
  6. Schmitt PR, Sanderson W, Rogers JT 3rd, Barzee TJ, Peterson MM. A Comparison of Devices for Race Day Characterization of North American Turfgrass Thoroughbred Racing Surfaces. Animals (Basel) 2023 Dec 21;14(1).
    doi: 10.3390/ani14010038pubmed: 38200768google scholar: lookup