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Home / Equine Research Bank / J Vet Intern Med / Effects of soaked hay on lung function and airway inflammati...
Journal of veterinary internal medicine2023; doi: 10.1111/jvim.16919

Effects of soaked hay on lung function and airway inflammation in horses with severe asthma.

Abstract: Reducing inhaled dust particles improves lung function in horses with severe asthma. Soaked hay is commonly used by owners, but its efficacy in improving lung function and inflammation has not been documented. Objective: To measure the effects of soaked hay and alfalfa pellets in horses with severe asthma. Methods: Ten adult horses with severe asthma from a research colony. Methods: Prospective controlled trial. Horses in clinical exacerbation were housed indoors and allocated to be fed either soaked hay (n = 5) or alfalfa pellets (n = 5) for 6 weeks. Soaked hay was immersed for 45 minutes and dried out hay was discarded between meals. Pulmonary function and clinical scores were measured before and after 2, 4, and 6 weeks. Tracheal mucus scores and bronchoalveolar lavages were performed before and after 6 weeks. Lung function was analyzed with a linear mixed model using log-transformed data. Results: Lung resistance decreased from (median (range)) 2.47 (1.54-3.95) to 1.59 (0.52-2.10) cmH O/L/s in the pellets group and from 1.89 (1.2-3.54) to 0.61 (0.42-2.08) cmH O/L/s in the soaked hay group over the 6-week period for an average difference of 1.06 cmH O/L/s for pellets (95% confidence interval [95% CI]: 0.09-2.04, P = .03, not significant after correction) and 1.31 cmH O/L/s for soaked hay (95% CI: -0.23 to 2.85, P < .001, significant). Conclusions: Soaked hay can control airway obstruction in horses with severe asthma. The strict protocol for soaking and discarding dried-out hay in this study could however be considered too great of an inconvenience by owners.
© 2023 The Authors. Journal of Veterinary Internal Medicine published by Wiley Periodicals LLC on behalf of American College of Veterinary Internal Medicine.
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Publication Date: 2023-11-06 PubMed ID: 37930110DOI: 10.1111/jvim.16919Google Scholar: Lookup
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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 investigates the effects of feeding soaked hay on the lung function and airway inflammation in horses suffering from severe asthma. The findings demonstrate that using soaked hay can significantly improve the condition, although properly following the soaking protocol may be considered burdensome by some horse owners.

Study Background

  • Reducing inhalation of dust particles has been proved to enhance the lung function in horses with severe asthma.
  • Although horse owners commonly use soaked hay, until this study was conducted, its effectiveness in improving lung function and decreasing inflammation remained undocumented.

Objective and Methodology

  • The primary objective of the study was to quantify the effects of soaked hay and alfalfa pellets on horses suffering from severe asthma.
  • The study was a prospective controlled trial that involved ten adult horses with severe asthma selected from a research colony.
  • These horses, in the midst of clinical exacerbation, were housed indoors and equally divided into two groups: one was fed soaked hay, and the other alfalfa pellets, over a period of six weeks.
  • The procedure for preparing soaked hay involved immersing it in water for 45 minutes and discarding dried-out hay between meals.
  • The researchers measured pulmonary function and clinical scores before and after the 2nd, 4th, and 6th weeks. Tracheal mucus scores and bronchoalveolar lavages were also conducted at these times.
  • Analysis of lung function was done using a linear mixed model and utilizing log-transformed data.

Results

  • The results showed that lung resistance decreased significantly in both the pellets and soaked hay groups over the six-week period.
  • The average difference for the pellets group didn’t hold statistical significance after correction, but it did for the soaked hay group, marking a significant improvement.

Conclusions

  • The study concludes that soaked hay can effectively control airway obstruction in horses with severe asthma.
  • Nonetheless, the strict protocol for soaking and discarding dried-out hay, while crucial in these improvements, may be considered inconvenient or burdensome by some horse owners.

Cite This Article

APA
Westerfeld R, Payette F, Dubuc V, Manguin E, Picotte K, Beauchamp G, Bédard C, Leclere M. (2023). Effects of soaked hay on lung function and airway inflammation in horses with severe asthma. J Vet Intern Med. https://doi.org/10.1111/jvim.16919

Publication

Journal of veterinary internal medicine
ISSN: 1939-1676
NlmUniqueID: 8708660
Country: United States
Language: English

Researcher Affiliations

Westerfeld, Roxane
  • Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Payette, Flavie
  • Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Dubuc, Valérie
  • Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Manguin, Estelle
  • Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Picotte, Khristine
  • Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Beauchamp, Guy
  • Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Bédard, Christian
  • Department of Pathology and Microbiology, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.
Leclere, Mathilde
  • Department of Clinical Sciences, Faculté de Médecine Vétérinaire, Université de Montréal, Q, Canada.

Grant Funding

  • Equine Health Fund from the Faculty of Veterinary Medicine of the Universitu00e9 de Montru00e9al, supported by Zoetis
  • Fonds du Centenaire of the Universitu00e9 de Montru00e9al

References

This article includes 39 references
  1. Couetil LL, Cardwell JM, Gerber V. Inflammatory airway disease of horses-revised consensus statement.. J Vet Intern Med 2016;30:503-515.
  2. Leclere M, Lavoie-Lamoureux A, Lavoie JP. Heaves, an asthma-like disease of horses.. Respirology 2011;16:1027-1046.
  3. Woods PS, Robinson NE, Swanson MC. Airborne dust and aeroallergen concentration in a horse stable under two different management systems.. Equine Vet J 1993;25:208-213.
  4. Jochmans-Lemoine A, Picotte K, Beauchamp G, Vargas A, Lavoie JP. Effects of a propriety oiled mixed hay feeding system on lung function, neutrophilic airway inflammation and oxidative stress in severe asthmatic horses.. Equine Vet J 2020;52:564-571.
  5. Clements JM, Pirie RS. Respirable dust concentrations in equine stables. Part 2: the benefits of soaking hay and optimising the environment in a neighbouring stable.. Res Vet Sci 2007;83:263-268.
  6. Ivester KM, Couëtil LL. Management of chronic airway inflammation in the horse: a systematic review.. Equine Vet Educ 2014;26:647-656.
  7. McGorum BC, Ellison J, Cullen RT. Total and respirable airborne dust endotoxin concentrations in three equine management systems.. Equine Vet J 1998;30:430-434.
  8. Pirie RS. Recurrent airway obstruction: a review.. Equine Vet J 2014;46:276-288.
  9. Ivester KM, Couetil LL, Zimmerman NJ. Investigating the link between particulate exposure and airway inflammation in the horse.. J Vet Intern Med 2014;28:1653-1665.
  10. Moore-Colyer MJ, Lumbis K, Longland A. The effect of five different wetting treatments on the nutrient content and microbial concentration in hay for horses.. PloS One 2014;9:e114079.
  11. Pirie RS, Dixon PM, Collie DD. Pulmonary and systemic effects of inhaled endotoxin in control and heaves horses.. Equine Vet J 2001;33:311-318.
  12. Leclere M, Lavoie-Lamoureux A, Joubert P. Corticosteroids and antigen avoidance decrease airway smooth muscle mass in an equine asthma model.. Am J Respir Cell Mol Biol 2012;47:589-596.
  13. Art T, McGorum BC, Lekeux P. Environmental control of respiratory disease.. In: Lekeux P, ed. Equine Respiratory Diseases. Ithaca, New York: International Veterinary Information Service; 2002.
  14. Hothersall B, Nicol C. Role of diet and feeding in normal and stereotypic behaviors in horses.. Vet Clin North Am Equine Pract 2009;25:167-181.
  15. Olave CJ, Ivester KM, Couetil LL, Kritchevsky JE, Tinkler SH, Mukhopadhyay A. Dust exposure and pulmonary inflammation in Standardbred racehorses fed dry hay or haylage: a pilot study.. Vet J 2021;271:105654.
  16. Olave CJ, Ivester KM, Couetil LL, Burgess J, Park JH, Mukhopadhyay A. Effects of low-dust forages on dust exposure, airway cytology, and plasma omega-3 concentrations in thoroughbred racehorses: a randomized clinical trial.. J Vet Intern Med 2022;37:338-348.
  17. Boivin R, Pilon F, Lavoie JP, Leclere M. Adherence to treatment recommendations and short-term outcome of pleasure and sport horses with equine asthma.. Can Vet J 2018;59:1293-1298.
  18. Dixon PM, Railton DI, McGorum BC. Equine pulmonary disease: a case control study of 300 referred cases. Part 2: details of animals and of historical and clinical findings.. Equine Vet J 1995;27:422-427.
  19. Hotchkiss JW, Reid SW, Christley RM. A survey of horse owners in Great Britain regarding horses in their care. Part 1: horse demographic characteristics and management.. Equine Vet J 2007;39:294-300.
  20. Simoes J, Sales Luis JP, Tilley P. Owner compliance to an environmental management protocol for severe equine asthma syndrome.. J Equine Vet 2020;87:102937.
  21. Blackman M, Moore-Colyer MJS. Hay for horses: the effects of three different wetting treatments on dust and nutrient content.. Anim Sci 2010;66:745-750.
  22. Moore-Colyer MJS, Taylor JLE, James R. The effect of steaming and soaking on the respirable particle, bacteria, mould, and nutrient content in Hay for horses.. J Equine Vet 2016;39:62-68.
  23. Moore-Colyer MJS. Effects of soaking hay fodder for horses on dust and mineral content.. Anim Sci 2010;63:337-342.
  24. Whittaker AG, Hughes KJ, Parkin TD. Concentrations of dust and endotoxin in equine stabling.. Vet Rec 2009;165:293-295.
  25. Robinson NE, Olszewski MA, Boehler D. Relationship between clinical signs and lung function in horses with recurrent airway obstruction (heaves) during a bronchodilator trial.. Equine Vet J 2000;32:393-400.
  26. Rush BR, Raub ES, Rhoads WS. Pulmonary function in horses with recurrent airway obstruction after aerosol and parenteral administration of beclomethasone dipropionate and dexamethasone, respectively.. Am J Vet Res 1998;59:1039-1043.
  27. Gerber V, Straub R, Marti E. Endoscopic scoring of mucus quantity and quality: observer and horse variance and relationship to inflammation, mucus viscoelasticity and volume.. Equine Vet J 2004;36:576-582.
  28. Fleming K, Hessel EF, van den Weghe HFA. Generation of airborne particles from different bedding materials used for horse keeping.. J Equine Vet 2008;28:408-418.
  29. Ivester KM, Couetil LL, Moore GE. An observational study of environmental exposures, airway cytology, and performance in racing thoroughbreds.. J Vet Intern Med 2018;32:1754-1762.
  30. Robinson NE, Jackson CA, Peroni D, Gerber V. Management of heaves.. Equine Vet Educ 2001;13:247-259.
  31. Koblinger K, Nicol J, McDonald K. Endoscopic assessment of airway inflammation in horses.. J Vet Intern Med 2011;25:1118-1126.
  32. Raidal SL, Love DN, Bailey GD. Effects of posture and accumulated airway secretions on tracheal mucociliary transport in the horse.. Aust Vet J 1996;73:45-49.
  33. Moore-Colyer MJS, Fillery BG. The effect of three different treatments on the respirable particle content, total viable count and mould concentrations in hay for horses.. In: Saastamoinen M, Fradinho MJ, Santos AS, Miraglia N, eds. Forages and Grazing in Horse Nutrition. Wageningen: Wageningen Academic Publishers; 2012:101-106.
  34. Warr EM, Petch JL. Effects of soaking hay on its nutritional quality.. Equine Vet Educ 1992;5:169-171.
  35. Blundell EL, Adjei LJ, Brigden CV. The effect of steaming and soaking treatments on respirable dust content of hay and the potential environmental polluting impact of the waste water produced.. In: Saastamoinen M, Fradinho MJ, Santos AS, Miraglia N, eds. Forages and Grazing in Horse Nutrition. Wageningen: Wageningen Academic Publishers; 2012:125-128.
  36. Longland AC, Barfoot C, Harris PA. Effects of soaking on the water-soluble carbohydrate and crude protein content of hay.. Vet Rec 2011;168:618.
  37. Owens TG, Barnes M, Gargano VM. Nutrient content changes from steaming or soaking timothy-alfalfa hay: effects on feed preferences and acute glycemic response in standardbred racehorses1.. J Anim Sci 2019;97:4199-4207.
  38. Merkies K, Bogart E. Discrimination of sour and sweet solutions by mature horses.. J Equine Vet 2013;33:330-331.
  39. Henneke DR, Potter GD, Kreider JL. Relationship between condition score, physical measurements and body fat percentage in mares.. Equine Vet J 1983;15:371-372.

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