Antifreeze keeps car engines running in freezing weather, and that makes it a fixture in garages, driveways and parking lots every winter. It is also one of the most dangerous household chemicals for dogs. Even a small amount can cause severe illness. Understanding why it is so hazardous, and how to prevent exposure, is an important part of winter safety.
Why antifreeze is so dangerous
Many traditional antifreeze and engine coolant products contain ethylene glycol. Ethylene glycol is toxic to dogs, cats and people, and only a small quantity is needed to cause serious harm, particularly to the kidneys. It has a sweet taste, which may make it more appealing to an animal that finds a puddle. Ethylene glycol can also be found in some other products, so read labels on chemicals you keep at home.
Some antifreeze products use propylene glycol instead, which is generally considered less toxic, and some ethylene glycol products include a bittering agent to discourage tasting. Neither feature makes antifreeze safe for pets. Treat every coolant product as a serious hazard.
Where dogs encounter it
- Drips and puddles under cars in driveways, garages and parking lots
- Spills when coolant is added or changed
- Open or leaking containers on garage floors or shelves
- Water mixed with coolant in toilets or plumbing at seasonal homes that have been winterized
Dogs on walks can step in a puddle and then lick their paws, so exposure does not always come from drinking it directly.
Prevention at home and on walks
Store antifreeze in its original, tightly closed container, up high or locked away where pets cannot reach. Clean up spills immediately and thoroughly, and dispose of used coolant according to your local rules, which your town’s .gov site or public works department can explain. Check your vehicles for leaks, especially if you see bright-colored puddles. On walks, keep your dog away from puddles in parking lots and driveways, and wipe paws when you get home. If you have a seasonal property, ask your plumber about pet-safe winterizing options and keep toilet lids down.
Signs of possible poisoning
Early signs can resemble drunkenness: wobbliness, stumbling, lethargy, vomiting and increased thirst or urination. A dog may appear to improve for a while even though the poison is still doing damage. That temporary improvement is one reason antifreeze is so dangerous. Later signs can be severe.
If you suspect exposure, act now
Do not wait for symptoms. If you think your dog may have licked or swallowed antifreeze, contact your veterinarian, an emergency animal hospital or an animal poison control service immediately. Treatment is time-sensitive, and outcomes are generally better the sooner a dog gets care. Bring the product container or note the brand if you can. Do not try home remedies or induce vomiting unless a veterinary professional tells you to. This article is general information, and a vet is the only one who can assess and treat your dog. Keeping coolant locked away and puddles cleaned up is one of the most valuable winter habits a dog owner can have.
