Antifreeze and rat bait come out every October, right when cars get winterized and rodents start looking for a warm place to spend the winter. Both are fixable if you move fast. Here is what fast actually means.
If your pet may have swallowed antifreeze or rat bait, call your vet, an emergency clinic, or a pet poison line right now, before any symptoms show up. With antifreeze, the antidote works best within about 3 hours for cats and 8 to 12 hours for dogs. With rat bait, bring the package. The active ingredient decides the treatment, and the color of the bait tells you nothing.
Hotline hours and fees from ASPCA12 and Pet Poison Helpline.15 Your own vet or local emergency clinic is always a good first call too.
Fall is cozy season for everybody, rats included. Around Bonney Lake and Buckley, October is when the garage gets reorganized, coolant gets topped off before the first freeze, and somebody finally deals with the scratching sound in the attic. That combination puts two of the most dangerous household poisons for pets within reach in the same few weeks.
Rodenticides were the seventh most common toxin exposure reported to ASPCA Animal Poison Control in 2025, at 6.5% of cases.10 Antifreeze is less common and far less forgiving. Both have one thing in common that makes them nasty: your pet can look completely fine while the damage is already underway.
Most traditional antifreeze is ethylene glycol. It tastes sweet, has no smell to warn anyone off, and the lethal dose is tiny. Pet Poison Helpline puts it at as little as one teaspoon for a cat, or a tablespoon or two for a dog depending on size.2 The Merck Veterinary Manual lists the minimum lethal dose of undiluted antifreeze at 1.4 mL per kilogram for cats and 4.4 to 6.6 mL per kilogram for dogs.1
That means a puddle under a leaking car, a drip from a radiator flush on the driveway, or a half-rinsed jug in the recycling bin is plenty.
About the bittering agent: Washington has required antifreeze sold here with more than 10% ethylene glycol to contain a bitter additive, denatonium benzoate, since 2010.4 That helps. It does not make antifreeze safe. Older jugs predate the rule, pets still drink it, and the dose that kills is small enough that a single curious lick can matter for a cat.
You may also see propylene glycol antifreeze sold as the pet-safer choice. It is less toxic, but Pet Poison Helpline still calls high-concentration propylene glycol products dangerous to animals, and notes cats can develop severe anemia from repeated exposure.5 Treat every jug in the garage as a poison.
Ethylene glycol poisoning follows a pattern that anyone who read our mushroom guide will recognize. It gets better before it gets much worse.
The antidote, fomepizole, is the whole ballgame, and it runs on a clock. Pet Poison Helpline says cats need treatment within 3 hours and dogs within 8 to 12 hours.2 The ASPCA's guidance for veterinarians gives cats about 4 hours.3 Either way, "let's see how she is in the morning" uses up the window.
Antifreeze also shows up in places that are not the garage: windshield de-icer, brake fluid, toilet de-icers in cabins, some paints and wood stains, and even imported snow globes.2 If you have a vacation cabin that gets winterized, that last one is worth a second look.
When temperatures drop, rodents move toward buildings to nest and stay warm.13 Bait stations go out, and dogs, who will eat nearly anything, find them.
The thing most owners do not know is that "rat poison" is not one poison. There are several very different chemicals on the market, and they work in completely different ways.
| Type | When signs start | What it does | Antidote? |
|---|---|---|---|
| Anticoagulants | 3 to 5 days | Stops blood from clotting. Weakness, pale gums, trouble breathing, bleeding | Yes, vitamin K1 for about 4 weeks |
| Bromethalin | 2 to 36 hours, longer at low doses | Brain swelling. Tremors, wobbliness, seizures | None |
| Cholecalciferol (vitamin D3) | Kidney failure in 2 to 3 days | Dangerously high calcium, then kidney damage | None |
| Zinc or aluminum phosphide | Fast, often within hours | Releases toxic gas in the stomach. Vomiting, bloating | None |
Look at that antidote column and the reason for the package rule becomes obvious. Vitamin K1 treats anticoagulants and does nothing for bromethalin or cholecalciferol.11 Your vet cannot treat the right poison without knowing which one it was.
Color means nothing. There is no industry color code for rodenticides. Green, blue, and teal blocks can hold entirely different chemicals, and both Pet Poison Helpline and Merck say bait cannot be identified by color, shape, or size.11 7 Bring the box, or photograph the label, especially the active ingredient and the EPA Reg. No. Even an empty package helps.
One more wrinkle: if your pet ate a phosphide bait and vomits, the vomit can release phosphine gas, which smells like rotting fish or garlic and is dangerous to people. Merck advises driving to the vet with the car windows open.14
Your neighbor might have, and so might a pest control company. Since the EPA's 2008 rodenticide decision, bait sold to homeowners has to come in tamper-resistant bait stations, and the strongest long-acting anticoagulants (brodifacoum, bromadiolone, difenacoum, and difethialone) are no longer registered for consumer products.8 Licensed professionals can still use them. If you have a pest service, ask what they placed and where, and write it down.
Dogs can also be poisoned secondhand by eating a rodent that ate bait. The UC Statewide IPM Program notes a dead rat can carry several lethal doses of anticoagulant.9 The relay risk is lower with the other types, but a dog that finds a dead rodent in October should get the same phone call.
If you do not already have an after-hours clinic saved in your phone, our roundup of vets and pet businesses around Bonney Lake is a good place to find one before you need it.
That last bullet is not us being self-serving. The University of California's pest management program tells homeowners directly to "clean up feces from dogs, cats, and other animals since rats will eat feces."9 A yard with a week of piles in it is a buffet, and a yard that feeds rats is a yard where somebody eventually puts out bait. Fewer rodents in the first place means fewer poison decisions to make.
If you are curious about what else is living in those piles, our post on why dog waste is a real health risk covers the bacteria and parasites, and why dogs keep getting parasites after treatment covers how the yard keeps reinfecting them.
The short version: call first and ask questions later. For antifreeze, the clock is measured in hours. For rat bait, the package is the diagnosis. And the easiest rat bait is the bait you never need to put out, which starts with a clean yard and sealed pet food.
Very little. Pet Poison Helpline says as little as one teaspoon can be fatal for a cat and a tablespoon or two for a dog, depending on size. Treat any possible exposure as an emergency.
Not necessarily. Ethylene glycol poisoning often starts with a drunk-looking phase, then signs ease around 12 to 24 hours while kidney damage continues. Kidney failure typically follows at 36 to 72 hours in dogs. Call a vet now, because the antidote works best within about 8 to 12 hours for dogs and 3 hours for cats.
The package, or a photo of the label showing the active ingredient and the EPA Reg. No. Different rat poisons need completely different treatment, and vitamin K1 only works for the anticoagulant type. Even an empty box helps.
No. There is no standard color code for rodenticides. Different chemicals come in the same colors and shapes, and poison control experts say bait cannot be identified by color alone.
Yes, especially with anticoagulant baits, since a dead rodent can carry several lethal doses. Secondary poisoning is less likely with other types but still possible. If your dog eats a dead rodent, call your vet or a poison line.
Yes. The University of California Statewide IPM Program advises cleaning up feces from dogs and cats because rats will eat it. Removing waste regularly and storing pet food in sealed containers takes away easy food sources.
We are a pet waste and pet care company, not a veterinary practice. This article is general information checked against the sources above. For anything involving your own pet, call your veterinarian.
Rats will eat dog poop. We pick it up every week so they have one less reason to move in, and you have one less reason to put out bait. Weekly plans are $99/mo (monthly visits start at $49), month-to-month, serving Bonney Lake, Buckley, and nearby Pierce County.
See Scooping Plans → Rather do it yourself? Here are the scooper tools we actually use.