My dog just ate rat poison. What do I do first?

Go to a vet or emergency clinic now, and grab the packaging or bait block on the way. If ingestion was recent, the vet can induce vomiting before much is absorbed — the single most effective intervention. Do not induce vomiting at home unless a professional instructs you.

How long after eating rat poison do dogs show symptoms?

It depends on the type. Anticoagulants cause no visible signs for roughly three to five days while clotting factors run out; cholecalciferol takes a day or more; bromethalin can cause tremors within hours to days. Looking fine today means nothing.

Why does the vet need the packaging?

Because the main rodenticide families — anticoagulants, bromethalin and cholecalciferol — are entirely different poisons. One has an antidote (vitamin K1), the others do not, and monitoring and treatment diverge from the first hour.

Can my dog be poisoned by eating a poisoned mouse?

Yes — relay poisoning is real, especially with repeated snacking or cholecalciferol baits. Call your vet whenever your dog eats a rodent that may have been baited.

What If My Dog Ate Rat Poison? Vet-Sourced Answer

What If My Dog Ate Rat Poison?

Toxic to dogs

No. Every type of rat poison is a dog emergency — go to the vet immediately and bring the packaging so they know which toxin they are treating.

Quick facts

Quick facts
Verdict	Toxic
Risky amount	No safe or toxic dose is established — treat any amount as a risk.
Key symptoms	Lethargy or weakness, Pale gums, bruising or bleeding (anticoagulants, often delayed days), Coughing or labored breathing, Tremors or seizures (bromethalin), Increased thirst and urination (cholecalciferol), Vomiting
What to do	Go to a vet immediately — do not wait for symptoms, which can be delayed by days while damage builds. Bring the package or take a photo of it; treatment differs completely between rodenticide types.

Why every rat poison is a dog emergency

Rodenticides are engineered to kill mammals, and a dog is just a bigger mammal. Worse, the bait is made appetizing — grain and sugar blocks that dogs eat enthusiastically. There is no “probably fine” amount, because the type matters as much as the dose, and several types show no symptoms until the damage is advanced.

Know your enemy

Type	What it does	Key fact
Anticoagulants (e.g. brodifacoum)	Stops blood clotting	Signs delayed ~3–5 days; vitamin K1 is the antidote
Bromethalin	Brain swelling	Tremors, seizures; no antidote
Cholecalciferol (vitamin D3)	Kidney failure via high calcium	Tiny doses dangerous; no antidote — same mechanism as vitamin D pills
Zinc phosphide	Toxic gas in the stomach	Rapid onset; the vomit itself is hazardous

What to do — and what not to do

Go to the vet now, with the packaging or a photo of it. Early decontamination is the best treatment for every type. Do not wait for symptoms, do not induce vomiting on your own, and afterwards remember the second route of exposure: a dog that eats a poisoned rodent — see carrion — can be poisoned secondhand.

If your dog ate it

Go to a vet immediately — do not wait for symptoms, which can be delayed by days while damage builds. Bring the package or take a photo of it; treatment differs completely between rodenticide types.

In the US you can also call the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee may apply).

Frequently asked questions

My dog just ate rat poison. What do I do first?: Go to a vet or emergency clinic now, and grab the packaging or bait block on the way. If ingestion was recent, the vet can induce vomiting before much is absorbed — the single most effective intervention. Do not induce vomiting at home unless a professional instructs you.
How long after eating rat poison do dogs show symptoms?: It depends on the type. Anticoagulants cause no visible signs for roughly three to five days while clotting factors run out; cholecalciferol takes a day or more; bromethalin can cause tremors within hours to days. Looking fine today means nothing.
Why does the vet need the packaging?: Because the main rodenticide families — anticoagulants, bromethalin and cholecalciferol — are entirely different poisons. One has an antidote (vitamin K1), the others do not, and monitoring and treatment diverge from the first hour.
Can my dog be poisoned by eating a poisoned mouse?: Yes — relay poisoning is real, especially with repeated snacking or cholecalciferol baits. Call your vet whenever your dog eats a rodent that may have been baited.