WHAT TO DO NEXT
Douse him with water. Ice water is best, but use the coldest you have on hand. Drench the horse thoroughly, scrape him dry, then repeat. Scraping away the water is vital---waiting for the water to evaporate won’t work fast enough. Also, if you have ice or cold packs handy, press them against the large blood vessels under his throat--this cools the blood flowing toward the brain. If you have enough ice packs, enlist friends to place them in the armpits and groin if the horse will let you.