Is Antifreeze (Ethylene Glycol) Safe for Dogs?
Why it’s a problem
Ethylene glycol tastes sweet, so dogs and cats willingly drink puddles from driveways and garage floors. The body converts it into crystals that destroy the kidneys and poison the brain. Less than a teaspoon per kilogram of body weight can be lethal.
How to keep your pet safe
Store antifreeze sealed and off the floor; clean every drip and spill with water immediately; consider propylene glycol ("pet-safe") coolant instead. On walks, do not let your dog drink from puddles or lick the ground in parking areas.
Warning signs to watch for
Early: drunken wobbliness, drooling, vomiting, increased thirst (looks like alcohol drunkness, 0.5–12 hours). Later: lethargy, vomiting returns, then little or no urine as kidneys fail (12–36 hours).
When to call the vet
This is a true emergency measured in hours — the antidote works only if given before kidney crystals form. Go to a vet immediately; do not wait for the later stage.
Common questions
My dog licked a puddle in the parking lot — is that antifreeze?
It might be, and you cannot tell by looking. If the puddle was under a car, call your vet now; early treatment is cheap and effective, late treatment often fails.
Is "pet-safe" antifreeze really safe?
Propylene glycol antifreeze is far less toxic but still not drinkable — it can sicken in quantity. Safer, not harmless.
More household hazards for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).