Toxic to dogs · Chemicals

Is Mouse and Rat Poison toxic to dogs?

Extreme severity No safe amount — No amount is considered safe.

Yes, Mouse and Rat Poison is extremely toxic to dogs. Even a small amount can be life-threatening, so treat any exposure as an emergency and contact a vet immediately. No amount is considered safe.

Video explainer

Why is rat poison toxic to dogs and cats?

Open the video page →

What to do right now

  1. Call your vet or an animal poison line now, even if your dog seems fine. Signs can take days to appear, and some of these poisons are much harder to treat once they do. In the US: Pet Poison Helpline (855) 764-7661 (a fee applies) or ASPCA Animal Poison Control (888) 426-4435.
  2. Keep the package or take a clear photo of the label, and read the active ingredient and its percentage out to the vet. The treatment depends on it, and you can't tell from the bait's color, shape or brand name. If you can't find the package, call anyway.
  3. Note roughly how much bait is missing and when your dog got to it.
  4. Don't make your dog vomit, and don't give charcoal, salt, milk, food, over-the-counter vitamin K or any other remedy unless a vet or poison line tells you to. Home attempts can injure the throat and stomach.
  5. If it was mole, gopher or vole bait (a phosphide), or the vomit smells of garlic or rotten fish: don't feed your dog, because food makes the bait release more toxic gas. Drive to the vet with the car windows open and avoid breathing fumes from the vomit. If anyone feels unwell, contact a doctor or a human poison center.

Go to an emergency vet if

  • Your dog has trouble breathing, coughs (especially with blood), has pale gums, is weak or collapses.
  • Your dog bleeds or bruises for no clear reason: nosebleeds, bleeding gums, blood in the urine or stool, black tarry stool, or a swollen belly or joints.
  • Your dog trembles, has a seizure, walks unsteadily, has weak or paralyzed back legs, or seems unusually dull.
  • Your dog vomits again and again (especially with blood) or has a bloated, painful belly, particularly after eating mole or gopher bait.
  • In the days after a possible vitamin D3 bait, your dog drinks and urinates more, stops eating, vomits or has bad breath.
  • Your dog ate, or may have eaten, any rat or mouse bait. Don't wait for signs.

Symptoms to watch for

  • vomiting
  • anorexia
  • incoordination
  • tremors
  • seizures
  • altered mentation
  • paralysis
  • increased drinking
  • increased urination
  • bruising
  • swelling
  • difficulty breathing

How much is dangerous

No amount is known to be safe. The danger depends on the active ingredient and your dog's size, and it varies hugely even between anticoagulants: brodifacoum is dangerous in tiny amounts, while bromadiolone has a wider safety margin. Vitamin D3 baits have a very narrow safety margin. Your vet or a poison line works out the risk from the active ingredient and percentage on the package and how much bait is missing.

When signs appear

It depends on the active ingredient. Phosphides: signs usually start within minutes, rarely up to 24 hours later, and severe cases can die within 5 hours. Bromethalin: a large dose can cause tremors and seizures within 4 to 36 hours, and a smaller dose a slower, paralyzing illness, typically within 1 to 5 days; estimates across sources run from 2 hours to about a week. Vitamin D3: signs often start within 12 to 48 hours, and kidney failure can follow 2 to 3 days after eating the bait. Anticoagulants: bleeding usually shows after 3 to 7 days (some sources say 3 to 5), or sooner if your dog has been eating bait over time.

Why it's dangerous

These substances cause harm through various mechanisms including preventing blood clotting, causing life-threatening elevations in calcium, inducing brain swelling, or releasing toxic phosphine gas in the stomach.

Toxic compound: long-acting anticoagulants, cholecalciferol, bromethalin, phosphides

How vets treat it

Treatment depends on the active ingredient. If your dog is seen soon after eating the bait, the vet may make it vomit and give activated charcoal. Anticoagulants: the antidote is prescription vitamin K1 by mouth, for about 4 weeks after long-acting baits (28 to 30 days, depending on the source) and about 2 weeks after warfarin, with a clotting test a few days after the last dose. Dogs that are already bleeding may need a hospital stay with plasma or blood transfusions. Bromethalin: there is no antidote, so vets clear the gut early with repeated doses of charcoal, then treat brain swelling, tremors and seizures. Vitamin D3: there is no antidote; vets give charcoal, IV fluids and drugs that lower blood calcium, and check calcium and kidney values for days to weeks. Phosphides: the vet gives antacids to cut gas production, makes the dog vomit only in fresh air, and gives supportive care such as IV fluids, stomach protectants and liver support.

Outlook

It depends on the active ingredient and how early treatment starts. Anticoagulants have an antidote, so getting to a vet early is the key to preventing serious signs, and dogs that are already bleeding are at higher risk. Bromethalin: there is no antidote, so the outlook is best when treatment starts before signs appear; once signs start, they can last for weeks. Vitamin D3: early treatment matters. Dogs whose blood calcium and phosphorus stay normal 3 to 4 days after eating the bait are not expected to become ill, but calcium deposits can cause lasting damage such as chronic kidney disease. Phosphides: good if the dog is still normal 12 hours after eating the bait, guarded if several organs are affected.

Where pets are exposed

  • Rat and mouse baits (rodenticides), sold as blocks, soft baits or pellets and often placed in bait stations.
  • Anticoagulant baits, such as brodifacoum, bromadiolone, difenacoum, difethialone, warfarin, chlorophacinone and diphacinone. They stop the blood from clotting.
  • Bromethalin baits, now the type pets most often get into in the US. The name looks like brodifacoum or bromadiolone, but bromethalin is a different poison that attacks the brain and nerves.
  • Vitamin D3 baits, listed on the label as cholecalciferol. They push blood calcium to dangerous levels.
  • Mole, gopher and vole baits, often gray pellets, made with zinc phosphide. Aluminum and magnesium phosphide are also used as grain fumigants on farms.

Prevention

  • Store rat and mouse poisons in a locked cupboard or shed, never next to food or pet food.
  • Place bait only where pets can't reach it, inside the tamper-resistant bait station that comes with the product.
  • Write down how much bait you put out and where, check often that none has moved or gone missing, and keep the package or receipt for as long as the bait is in use.
  • Wearing gloves, remove dead rodents promptly so your pets can't eat them.
  • If a pest control company treats your home or yard, ask which active ingredient it uses and where it puts the bait.

Good to know

Active ingredients cannot be identified by color or shape alone; the EPA registration number is the most reliable identifier for appropriate treatment.

Common questions

My dog ate rat poison but seems fine. Do I still need a vet?

Yes. Call your vet or a pet poison line now and have the package ready. Anticoagulant baits usually cause no signs for several days while clotting fails, and bromethalin is best treated before any signs appear. Starting early is safer, and usually costs far less, than treating a dog that is already bleeding or having seizures.

Is vitamin K the antidote for all rat poisons?

No. Prescription vitamin K1 works only for anticoagulant baits, such as brodifacoum or bromadiolone. Bromethalin, vitamin D3 (cholecalciferol) and phosphide baits have no antidote and are treated very differently. Bromethalin is easily mistaken for an anticoagulant because of its name, so show your vet the actual label.

Can I tell what kind of rat poison it is from the color of the bait?

No. Baits of the same color and shape can contain completely different poisons, and products with similar names can contain different ingredients. The active ingredient on the label is the reliable way to know, so keep the package or photograph the label.

Can my cat be poisoned by eating a mouse or rat that ate poison?

It's possible but rare. With anticoagulant baits, a cat would usually need to eat many poisoned rodents, so outdoor cats that hunt around farms, stables or vineyards are at higher risk. For bromethalin, research hasn't shown it, though there are a few anecdotal reports in cats. If your cat hunts where bait is used and seems unwell, tell your vet about the possible exposure.

Should I make my pet throw up after eating rat poison?

No, not unless a vet or poison line tells you to, so call them first. Making a pet vomit at home can injure the throat and stomach, and there is no safe home method for cats. With phosphide mole or gopher baits, the vomit gives off a gas that is also toxic to people. If vomiting is needed, the vet will do it safely, with medicine and good ventilation.

Sources

This page is informational and is not veterinary advice. If your pet has been exposed to something risky, contact your vet or an animal poison control line right away.

· How we prepare our guides

More substances toxic to dogs

Kerosene High severity Antifreeze Extreme severity Bromethalin Extreme severity Petroleum Distillates Extreme severity Everything toxic to dogs →

Barcode food checks, now on iPhone.

Scan a product's barcode with StrawPaw to spot ingredients that can harm dogs and cats. The app is free to download.

Download on the App Store