Antifreeze is the one household liquid where hours genuinely decide the outcome. It tastes sweet, animals drink it willingly, and the amount that seriously harms a cat is smaller than most owners would believe. If there is any chance your pet has been near coolant, phone us immediately rather than waiting for signs.
Why the garage changes in October
Around Dunbar and West Point Grey, most of the coolant a pet meets is not in a garage at all. It is in a back lane, on a sloped driveway, or in the gutter beside street parking, because the first cold mornings of October are when older cooling systems start to weep and when people top things up.
Three things happen at once in this neighbourhood every autumn. Cars get checked over before the wet season. The rain starts, which spreads a spill across a wide area of concrete and then dilutes it into a puddle that looks like water. And cats start sleeping in sheltered places, which in Dunbar means under parked cars, inside half-open lane garages and on the warm concrete at the back of a lot.
You do not need a mechanic’s garage for this to be a risk. A single cracked overflow reservoir drips a teaspoon at a time onto a lane that several households and their cats share.
What it is and how little it takes
Most traditional antifreeze and engine coolant is ethylene glycol. It is sweet, it is brightly coloured, and it is one of the few common household poisons that animals actively seek out rather than sampling by accident.
The quantity is what shocks people. For a cat, licking it off their paws after walking through a spill can be enough to cause serious kidney injury. For a dog, a small drink from a puddle is a genuine emergency. Dogs get into more of it because dogs drink from puddles; cats get into it in smaller amounts because cats groom.
Colour is not a reliable guide. Coolant comes in bright green, orange, pink, yellow and blue depending on the formulation, and the colour tells you nothing useful about the risk. Some newer products use propylene glycol instead and are marketed as the safer option. They are genuinely less dangerous, but less dangerous is not harmless, and the same phone call applies.
Two more liquids from the same shelf matter in October. Windshield washer fluid often contains methanol, which is also toxic and also a sweetish liquid in a brightly coloured jug. Brake fluid is also sweet, because most of it is glycol based, so the same rules apply to it. Power steering fluid is more of an irritant, but a pet who walks through either will groom it off.
The three windows
This is the part worth knowing in advance, because it is the reason we say come now rather than watch and see. Ethylene glycol does its damage in stages.
The first few hours. The animal looks drunk. Wobbly, uncoordinated, maybe vomiting, maybe drinking and urinating more than usual, sometimes just unusually sleepy. Many owners put this down to something else entirely. This is the window in which help is most straightforward and most effective.
Roughly twelve to twenty-four hours. In a dog, the wobbliness often improves and the animal appears to get better. This is the stage that costs lives, because an owner who was worried last night decides the problem has passed, while underneath the chemical is being converted into the compounds that damage the kidneys. In a cat there is usually no such reprieve: by twelve to twenty-four hours the kidneys are already failing.
One to three days. In a dog, this is when the kidneys fail. By this point the animal is vomiting, not eating, producing little or no urine, and the situation is far harder. For a cat the whole sequence runs faster and the window to act is much narrower, which is why a cat is never a wait-and-see.
That middle stage is the entire reason this post exists. An animal who seems to have recovered from antifreeze has not recovered.
What to do if you suspect it
- Phone us now and set off. Do not wait for signs, do not wait for the morning, and do not wait to be sure. With this one, a suspicion is enough.
- Bring the container, or photograph the label and the ingredient panel. Ethylene glycol and propylene glycol are handled differently.
- Note the time. How long ago, and roughly how much is missing or how large the puddle was.
- Do not make your pet vomit at home. It wastes the window that matters and it is unsafe in an animal who is already unsteady.
- Give nothing by mouth. Not water, not food, not anything from your own cabinet, and nothing you have read about online.
- If it is on the coat or paws, wipe and rinse with warm water and dry them, so the animal cannot groom more of it off while you drive.
Come in through our urgent care. Seven days a week we open at 8:00 AM, 9:00 AM on Sundays, and we close at 7:00 PM on weekdays, 6:00 PM Saturday and 5:00 PM Sunday; statutory holidays we are shut. Coolant is usually discovered overnight or at first light, both of which fall outside that window. When it does, make for whichever emergency hospital is open and tell them on the way what your pet has been into. A suspected antifreeze case must never be held until we open.
What we do when you arrive
Time-critical care comes first, and the decision to start it is often made before any test result, because waiting for confirmation can cost the window. That is a deliberate choice, not an overreaction.
Our diagnostics then tell us what the kidneys are doing, how the blood chemistry has shifted and whether there is evidence of the compounds involved. Repeat samples over the following days matter as much as the first one, because the first set can look reassuring in an animal who is in trouble. Most of these patients need fluids and close observation over several days, which is where pet hospitalization and our medical services team come in.
The honest summary is this: animals brought in within the first few hours generally do well. Animals brought in once the kidneys are failing often do not, whatever anyone does. The difference is almost entirely about when the owner picked up the phone.
The autumn garage and lane check
Worth doing once, properly, in October.
- Look under your own car. On the driveway and in the lane. A bright green, orange or pink stain on concrete is coolant, and a wet patch under the front of the car on a dry day needs looking into.
- Hose down any spill thoroughly, rather than letting it dry or waiting for rain to spread it. Use plenty of water and move it off the surface where paws go.
- Check the overflow reservoir cap is on and the hose clips are tight. Most slow leaks are from a cracked plastic reservoir or a perished hose, not a dramatic failure.
- Store jugs sealed and up high, never on the floor, never in an open bucket, and never decanted into a drinks bottle or an unlabelled container. That last one is how children and pets are both poisoned.
- Do not leave a drain pan out. A pan of old coolant on a garage floor is the single most dangerous object in this article.
- Keep the lane garage shut, or make sure there is nothing on the floor if it stays open. Cats in this neighbourhood use open lane garages as shelter from the rain.
- Mention it to whoever services your car. Ask them to flag any coolant seep rather than topping it up and saying nothing.
- Check the shared lane. If a neighbour’s car is leaving a stain, a polite word now is easier than a phone call to us later.
Cats, and the paw route
Cats rarely drink coolant deliberately in any volume. They walk through it and wash. That is the whole mechanism, and it is why a thin film across a lane or a garage floor is more dangerous to a cat than a sealed jug on a shelf.
If your cat goes outside and there has been a spill anywhere nearby, bring them in, wipe the paws and legs with warm water, dry them, and phone us. If you only learn about a spill afterwards, a cat who seems unsteady, is drinking more than usual, is hiding, or has stopped eating needs to be seen without delay, even if you are not sure they were anywhere near it.
The wider point for cats is that autumn brings several of these at once: coolant in the lane, rodent bait in the garage, and plant material from the garden. Our guide on autumn bulbs and garden plants in Dunbar covers the garden half of the same problem.
Frequently asked questions
My dog licked a small puddle in the lane. Is that enough to matter?
Phone us straight away. For antifreeze, even a small amount from a puddle is handled as an emergency in a dog until we know how much and how concentrated, and it is not a situation where we would ask you to watch at home. If it turns out the puddle was only water, you have lost an hour. The other way around is not recoverable.
How soon would I see signs?
Signs can start as early as half an hour and are usually obvious within a few hours. The earliest sign looks like drunkenness: wobbliness, stumbling, sleepiness, sometimes vomiting or increased thirst. Those signs then improve, which is the trap. Do not use the absence of signs, or their improvement, to decide against coming in.
Is pet safe antifreeze actually safe?
Products based on propylene glycol are substantially less toxic than ethylene glycol, and switching to one is worthwhile. They can still cause problems in quantity, particularly in cats, so the same storage rules and the same phone call apply.
Does the colour tell me how dangerous it is?
No. Coolant is dyed green, orange, pink, yellow or blue purely to identify the formulation for mechanical purposes. Read the ingredient panel instead, and tell us which glycol it names.
What about windshield washer fluid?
Also toxic, usually because of methanol, and it comes in the same kind of brightly coloured jug that gets left on a garage floor in October. Store it the same way and phone us if a pet gets into it.
My cat walked through a spill but I cleaned the paws. Do we still need a visit?
Yes, please phone us. Cleaning the paws promptly helps a great deal, but cats start grooming within seconds and the margin in a cat is very small. We would far rather assess a cat who turns out to be fine.
Can I just bring a urine sample instead of the cat?
No. A sample on its own cannot tell us what an examination can, and in a time-critical case the delay is the problem. Bring the animal and, if it is easy, the container the liquid came from.
Speak to the team at Alta Vista Animal Hospital
If there is any chance your dog or cat has been near coolant, phone us now and bring the container with you. If we are closed, go straight to the nearest open emergency hospital and call them from the car.
Published by the team at Alta Vista Animal Hospital.
This article is for general educational purposes only and is not a substitute for an in-person veterinary examination or advice about your individual pet. If you have an urgent concern about your pet, contact Alta Vista Animal Hospital or your nearest emergency veterinary hospital right away.
Alta Vista Animal Hospital
4543 Dunbar St, Vancouver, BC V6S 2G7
Phone: (604) 221-5858
Hours: Monday to Friday 8:00 AM to 7:00 PM; Saturday 8:00 AM to 6:00 PM; Sunday 9:00 AM to 5:00 PM; statutory holidays closed