ANTIFREEZE (ETHYLENE GLYCOL) TOXICITY IN DOGS/CATS
WHAT THIS SYMPTOM USUALLY MEANS
Antifreeze contains ethylene glycol, a sweet-tasting chemical that causes rapid, fatal kidney failure if untreated within hours. Even a teaspoon can kill a cat or small dog.
MOST COMMON CAUSES
MILD OR SELF-LIMITING CAUSES (NONE)
All antifreeze ingestion is an emergency.
MEDICAL CAUSES THAT NEED DIAGNOSIS (MODERATE CONCERN)
• Very small ingestion without symptoms yet
• Early vomiting or mild depression
EMERGENCY CAUSES (HIGH CONCERN)
• Staggering, uncoordinated walking
• Excessive drooling
• Rapid breathing
• Seizures
• Severe vomiting
• Extreme thirst or no urination
• Kidney failure within 12–24 hours (cats), 24–72 hours (dogs)
RED FLAGS: WHEN THIS IS AN EMERGENCY
• ANY ingestion, even a few drops
• Vomiting + stumbling
• Drunken gait
• Tremors or seizures
• No urine production
If you’re unsure, treat it as urgent.
AT-HOME CARE YOU CAN START NOW
• Get to an emergency vet immediately
• Bring the container or photo of the product
• Do NOT induce vomiting without instruction
These steps do not replace a veterinary exam if symptoms continue or worsen.
WHAT A VETERINARIAN WILL CHECK
• Rapid blood testing for ethylene glycol
• Kidney function
• Acid-base status
• Antidotes (fomepizole or ethanol therapy)
• IV fluids
• Urine tests
• Dialysis in severe cases
MOST LIKELY DIAGNOSES (BASED ON 40 YEARS OF CASES)
• Ethylene glycol toxicity
• Acute kidney failure
• Severe metabolic acidosis
BREEDS OR AGES AT HIGHER RISK
• Cats (extremely sensitive)
• Small dogs
• Young, curious pets
WHEN YOU SHOULD SCHEDULE A VETERINARY VISIT
Immediate emergency care—within 1 hour if possible.
EXPECTED RECOVERY TIME
• If treated within 8–12 hours: guarded but possible
• After kidney failure: poor prognosis
LONGEVITY IMPACT
Any degree of kidney damage from antifreeze drastically shortens lifespan.
FAQ
Is antifreeze still sweet-tasting?
Many brands are—but even “pet-safe” versions are hazardous.
Can pets recover fully?
Only if treated extremely early.