27/01/2026
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🐎COOLING HOT HORSES - THE STATE OF THE ART🐎
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Apologies to those in cool climates at the present time :)
Seems we need to keep sharing this basic information to counter the myths that keep being circulated by certain "experts" :(
🐎WHY DO WE NEED TO COOL HORSES AFTER EXERCISE OR IF THEY GET TOO HOT?
-Horses produce heat 3-5 times faster on a per kg basis than we do
-Although horses are 6-7 times heavier, they only have 2 to 2.5 times as much surface area
-The majority of heat (~85%) is lost at the body surface
-Heat loss is also impaired in horses because they are covered in hair
-Horses can sweat faster than any other animal
-Sweating is efficient but slow
-Cooling with cold water is fast
-When horses compete in hot climates they can struggle to cool down after
-We cool them down with cold water (less than 15°C/60°F) to reduce the risk of heat illness and because there is no advantage to them being hot and uncomfortable after exercising. The quicker they cool, the quicker they drink, eat and recover.
-The methods to cool them are now well understood.
🐎Since Atlanta 1996 we have known that using continuous application of cold water (less than 15°C/60°F) all over the horses body without scraping is the most effective way to cool down horses that are moderately to severely hyperthermic (re**al temperature in excess of ~40°C/104°F), especially in hot or hot/humid conditions.
🐎The sources for this evidence are:
PEER-REVIEWED PUBLISHED PAPERS
1) Williamson, L.S., White, S., Maykuth, P., Andrews, F., Sommerdahl, C. and Green, E. Comparison between two post exercise cooling methods. Equine Vet J., 27(S18), 337-340.
https://beva.onlinelibrary.wiley.com/share/7MBUJJWJZPVWQKTNIJWN?target=10.1111/j.2042-3306.1995.tb04948.x
2) Marlin, D. J., Scott, C. M., Roberts, C. A., Casas, I., Holah, G., & Schroter, R. C. (1998). Post exercise changes in compartmental body temperature accompanying intermittent cold water cooling in the hyperthermic horse. Equine veterinary journal, 30(1), 28–34.
https://pubmed.ncbi.nlm.nih.gov/9458396/
3) Kohn, C.W., Hinchcliff, K.W. and McKeever, K.H. (1999) Evaluation of washing with cold water to facilitate heat dissipation in horses exercised in hot, humid conditions. American Journal of Veterinary Research, 01 Mar 1999, 60(3):299-305. https://pubmed.ncbi.nlm.nih.gov/10188810/
4) Takahashi, Y., Ohmura, H., Mukai, K., Shiose, T., & Takahashi, T. (2020). A Comparison of Five Cooling Methods in Hot and Humid Environments in Thoroughbred Horses. Journal of equine veterinary science, 91, 103130.
https://pubmed.ncbi.nlm.nih.gov/32684268/
5) Kang, H., Zsoldos, R.R., Skinner, J.E., Gaughan, J.B. and Guitart, A.S. (2021) Comparison of post-exercise cooling methods in horses. Journal of Equine Veterinary Science 100 (2021) 103485
https://doi.org/10.1016/j.jevs.2021.103485
🐎DATA COLLECTED & ANALYSED AT
a) Atlanta 1995 Olympic Test Event
b) Atlanta 1996 Olympics
c) Athens 2003 Olympic Test Event
d) Athens 2004 Olympics
e) Beijing 2007 Olympic Test Event
f) Beijing 2008 Olympics
g) Tryon 2018 World Equestrian Games
h) Tokyo 2019 Olympic Test Event
i) Tokyo 2020(1) Olympic Games Dressage and Eventing
🐎Cooling hot horses with cold water DOES NOT
1) cause muscle damage
2) cause laminitis
3) induce shock
4) give horses heart attacks
5) prevent them from cooling by constriction of skin blood flow
Water left on horses DOES NOT
1) insulate and prevent heat loss
2) cause them to overheat
🐎It is NOT MORE EFFECTIVE TO
1) start at the feet and work up
2) scrape water off whilst cooling (it causes them to warm up)
3) focus on large blood vessels
4) cover the horse with wet towels
5) place ice on large blood vessels near the surface such as the jugular veins or femoral arteries
6) put ice in the re**um
7) rely on misting fans
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