07/31/2025
๐ฅโ ๏ธ Heat & Horses โ ๏ธ๐ฅ
The Aftermath, the Myths, and the Mistakes That Still Kill
๐ง โ ๏ธ The Final Post in the Series โ ๏ธ ๐ง
โIโd rather waste a minute of my life than lose a life in one minute.โ
This post is that minute. Donโt waste it.
โ
๐ What Weโre Still Seeing
Despite record shares, reach, and readsโweโre still getting panicked calls for horses down, horses not sweating, horses dehydrated but refusing to drink.
The biggest killers?
โ Misinformation
โ Delayed action
โ Trust in the wrong people
And now, the silent wave beginsโthe aftershocks from horses that โseemed fineโ days ago.
โ
๐ฉบ The Aftermath: Days Later, Still at Risk
โ
They cooled off.
โ
They drank.
โ
They walked awayโฆ or so you thought.
๐ What weโre seeing 24โ72 hours later:
โข Kidney damage โ dehydration, NSAIDs, electrolyte mismanagement
โข Liver enzyme spikes โ hyperthermia, dehydration, metabolic crash
โข Colic โ ileus, impaction, gut shutdown
โข Laminitis โ under-recognized heat trigger
โข Anhidrosis onset โ body gives up on sweating
โข Appetite loss, dull coat, dark urine โ internal stress
๐ Confirmed by Cornell, UC Davis, p*er-reviewed equine heat stroke data (PMC10267279).
Even one overheating episode can leave permanent organ damage.
โ
โHeโs just quietโ = ๐จ until proven otherwise
๐ง The Critical Dehydration Threshold ๐ง
Once a horse loses 6โ8% of body water, they are clinically dehydrated.
By the time you notice, theyโve already lost liters of fluid.
๐ Once that happens, they often stop drinking.
Why?
โข Thirst shuts down when sodium is imbalanced
โข Gut absorption slows or stops
โข The body begins internal shutdown
๐งช At this stage, IV fluids or NG tubing may be the only way to rehydrate.
โ ๏ธ Donโt wait. If theyโve stopped drinking, youโre already behind.
โ
๐ซ The Fatal Fixes People Still Use ๐ซ
๐ฅ Electrolyte tubes without water โ worsens dehydration
๐ฅ Electrolyte-laced grains โ spike sugar, stress metabolic horses
๐ฅ NSAIDs like Banamine, Bute, Equioxx โ tank kidney perfusion
๐ฅ Hose in the mouth โ aspiration risk
๐ฅ Hose in the re**um โ gut rupture, electrolyte crash
๐ฅ ACE โ lowers blood pressure, shuts down organ perfusion
๐ Every one of these most likely killed a horse this week.
โ
๐งช The Myths That Canโt Seem To Die
๐ โHeโs sweating = safeโ โ NO. Sweating means water loss.
๐ โElectrolytes fix itโ โ Not without water.
๐ โHeโs acclimatedโ โ Even Florida-born horses are dropping.
๐ โI rinsed and fanned himโ โ Needs continuous cold water + airflow.
๐ โAlcohol burnsโ โ 1:1 or 1:2 alcohol-to-water = safe, vet approved.
๐ โIce water caused colicโ โ Wrong. The colic was already happening.
โ
๐ง True Cooling = Cold Water + Airflow + Repeat
โข Cold hose (50โ65ยฐF)
โข Donโt scrape
โข Add diluted alcohol
โข Cold towels to neck/groin
โข Shade and airflow
โข Repeat for 20โ30 minutes minimum
โ
Backed by: UC Davis, Cornell, AAEP, Ohmura et al. 2023
โ
๐ก๏ธ Why Florida Is More Lethal Than Texas
= Humidity.
๐ฅ 111ยฐF + 90% humidity = 176ยฐF heat index
๐ Nights drop to โ96ยฐF feels like 106ยฐFโ
No relief ~ no recovery
Sweat wonโt evaporate ~ internal boil
๐ง Even shaded, โacclimatedโ horses are cooking from the inside out.
โ
๐ BOTTOM LINE:
๐๐ผ Not drinking, Not sweating, Not p*eing, or Not acting right?
๐๐ผ ACT NOW!
๐๐ผ Donโt trust myths or Facebook advice.
You get ONE chance during collapse. After that? Just damage controlโif youโre lucky.
โ
๐ฃ SHARE THIS. Tape it to your feed room. Send it to your barn.
Because someoneโs horse is about to go down.
And this might be the post that saves them.
โ
๐งช 1. Baseline Bloodwork for At-Risk Horses
Metabolic, senior, performance, and anhidrotic horses should get preemptive panels:
โข BUN, Creatinine
โข AST, GGT, Bilirubin
โข Sodium, Potassium, Chloride, COโ
โข Glucose, Albumin, Total Protein, CK
๐ Cornell and UC Davis recommend early screening to catch silent issues before collapse.
โ
๐ง 2. Switch from Salt Blocks to Loose Electrolytes
Salt blocks are useless in summer.
A horse canโt lick fast enough to replace 30โ50g sodium lost/hour in sweat.
โ
Use plain salt + balanced electrolyte powders in every meal.
๐ง Critical for anhidrosis-prone, hard-working, or pastured horses in heat.
โ
๐จ 3. Build a Swamp Cooling Stall
โข Overhead and box fans
โข Wet stall walls and bedding
โข Ice water towels + misting alcohol
โ
Field-tested in Ocala: drops temp faster than hosing alone
โ
๐ธ 4. Use Thermal Imaging
Smartphone FLIR cameras detect:
โข Poor sweat zones
โข Limb inflammation
โข Internal hotspots
โ
Catch heat injuries before clinical signs
โ
๐ง 5. Train Your Staff
Laminate posters:
โข TPR cheat sheet
โข 20+ min cooling protocol
โข When to call vet
โข What NOT to give
โ
Training = lives saved
โ
๐ฉธ 6. Monitor the Recovery Phase (24โ72 hrs)
Even if they โlook better,โ internal damage progresses:
โข Creatinine and BUN spike
โข Liver enzymes rise
โข Gut perfusion tanks
โข CK surges โ rhabdo
โข Neurologic signs days later
โ
Twice daily vitals, proactive fluids, repeat bloodwork
โ
๐ 7. Avoid DIY โHydrationโ Mashes
โข High molasses = more heat
โข Poor electrolyte balance
โข Fiber with no absorption unless soaked
โ
Stick to soaked hay, plain beet pulp, balanced electrolytes
โ
๐ซ 8. NEVER Force Water by Hose or Re**um
Risks:
โข Choke
โข Aspiration
โข Re**al rupture
โข Gut shutdown
โ
No drinking means call a vet for IV or NG fluids
โ
๐งช 9. Horses That Stop Drinking = Red Alert
โข Thirst mechanism fails
โข Gut shuts down
โข Electrolyte crash
โ
IV fluids may reset thirst in hours. DO NOT WAIT.
โ
๐ง 10. Only Use Electrolyte Paste if Gut Is Working
Signs NOT to paste:
โข Dry gums
โข No gut sounds
โข No urine
โ
If eating, drinking, pooping: paste is okay.
Otherwise: fluids first.
โ
๐ง 11. Heat Stroke Can Trigger Permanent Anhidrosis
Damage to sweat glands, receptors, and thermoregulation may be irreversible.
๐ UF study: One collapse = higher chance of lifelong sweat loss.
โ
Monitor for sweat output after every heat event.
โ
๐ 12. Performance Loss Can Last Weeks
Even โrecoveredโ horses show:
โข Reduced VOโ max
โข Poor muscle recovery
โข Impaired hydration regulation
๐ Cornell & JEVS studies: 2โ4 weeks for full return to baseline
โ
๐ 13. Track the Trends
Signs before collapse:
โข Loose manure
โข Corner-standing
โข Subtle stiffness
โข Dark p*e
โข Low water intake
โ
Daily logs catch issues early
โ
๐งช 14. Repeat Bloodwork at 48โ72 hrs
๐ AAEP: Delayed organ failure is common post-heat.
โ
Watch Creatinine, BUN, GGT, AST, CK, Albumin, Glucose
โ
๐ 15. Create a Heat Episode Logbook
Include:
โข Vitals at collapse
โข Cooling timeline
โข Fluids used
โข Products tolerated
โข Vet notes
โข Triggers
โ
This log saves lives in future heat events.
โ
๐ฅ 16. Subclinical Heat Injury Exists
๐ J Vet Internal Med: Horses with no collapse still developed:
โข Muscle soreness
โข Dehydration
โข Organ stress
โข Mood changes
โ
Treat every high-risk day seriouslyโeven if โnothing happenedโ
โ
โ ๏ธ 17. Salt Alone Can Be Dangerous
Salt โ electrolytes.
Horses sweat out potassium, calcium, magnesiumโnot just sodium.
๐ Cornell: Replacing only sodium = worsens dehydration and thirst shutdown
โ
Complete formulas only
โ
๐ฉป 18. Post-Heat Laminitis Risk
Heat + gut shutdown + glucose spike = lamellar damage
๐ UC Davis + AAEP: Rads 3โ5 days post-collapse in metabolic horses
โ
Catch it before mechanical failure
โ
๐ง 19. Heat Stroke = Higher Anhidrosis Risk Later
๐ UF study: Even fully recovered horses may stop sweating months later.
โ
Log TPR, sweat, and behavior every heat wave
โ
๐ฉ 20. Leaky Gut After Heat = Weeks of Inflammation
Core temps >103ยฐF damage gut lining
๐ Cornell + BMC: LPS leaks โ colic, ulcers, immune crash
โ
Support gut with pectin-lecithin, S. boulardii, soaked hay
โ
โก 21. Behavior Changes = Physical Damage
Post-heat:
โข Spooky
โข Grumpy
โข Stopping at jumps
โข Resistant to girth
โ
Full exam. Donโt assume itโs โjust behaviorโ
โ
๐
22. Acclimation Wears Off
๐ Comparative Exercise Physiology: Acclimation lasts 2โ3 weeks
Rain, night turnout, or time off resets the clock
โ
Monitor ALL horsesโeven Florida natives
โ
๐งฌ 23. Subclinical Kidney Damage = Silent Killer
โข High-normal Creatinine
โข Persistent BUN
๐ SDMA, urine protein:creatinine ratios = better markers
โ
Avoid NSAIDs for 72 hrs post-event. Rehydrate fully.
โ
๐ 24. Cyclic Heat Spikes Are Worse Than Consistent Heat
๐ NCSU + Texas A&M: Repeated spikes wreck thermoregulation
โ
Hydration/rest based on trendsโnot just the daily high
โ
๐ 25. Meds Stay in System = Delayed Collapse
โข ACE โ impairs thermoregulation
โข Bute โ hides symptoms, damages kidneys
โข Gabapentin โ dulls heat distress response
โ
Avoid or reduce workload 48โ72 hrs post-medication
โ
๐งช 26. Glucose & Liver Values Predict Recovery Time
๐ UC Davis:
โข High glucose = stress response
โข High GGT/AST = gut-liver inflammation
โ
Soaked forage, Vitamin E, liver support for 7โ10 days post-event
โ
๐ฆ 27. Heat = Mold & Mycotoxin Spike
โข Aspergillus, Fusarium, Penicillium
๐ Cornell: Symptoms mimic heat stroke
โ
Store hay dry, discard soaked feed, avoid sweet feeds
โ
๐งซ 28. Endotoxin Rebound = Delayed Death
Even after cooling, gut sloughs โ LPS leak โ laminitis, lethargy, fever
๐ UC Davis + CSU
โ
Sucralfate, Biosponge, omega-3s, track vitals 48 hrs minimum
โ
๐ฅ 29. Internal Hyperthermia Lasts Hours
Re**al temp may read 101.5ยฐFโฆ but deep tissue still cooking
โ
Continue cooling long after normal readings
โ
Watch behavior, urination, manure
โ
๐ฅฉ 30. High-Protein Feeds Raise Internal Heat
14% CP = metabolic heat load
๐ Cornell + KER: Avoid alfalfa, high-protein grain post-collapse
โ
Use soaked hay + fat-based feeds only
โ
๐ง 31. Salt Craving โ Thirst
Licking people, dirt, buckets = sodium/zinc deficiency
๐ KER: Water and salt must both be replaced
โ
Salt in feed, soaked mash, and electrolyte water
โ
๐ฉธ 32. Hemoconcentration Fools Bloodwork
โNormalโ PCV + TP can hide dehydration
โ
Skin tent and MM moisture = more reliable in early crisis
โ
๐ง 33. Brain Damage From Heat Stroke Is Real
โข Ataxia
โข Circling
โข Aggression
โข Seizures (especially minis, foals)
๐ J Vet Internal Med: MRI-confirmed hippocampal damage in one survivor
โ
Monitor neuro signs, use Vitamin E, consider imaging
โ
๐ช 34. Rhabdo Can Shut Down Kidneys Days Later
CK spike โ myoglobin in blood โ clogs renal tubules
โ
Watch urine color, flank pain, hydration status
โ
๐งฏ 35. Geriatrics & Minis Crash Quietly
Slow decline:
โข Less drinking
โข Dry manure
โข Subtle mood change
๐ AAEP + Cornell: โAtypical collapseโ = just as fatal
โ
Intervene early, hydrate, monitor TPR daily
โ
โผ๏ธFINAL WARNINGโผ๏ธ
You may not get a second chance.
Act early.
Act smart.
Act like their life depends on itโฆbecause it does.