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Guide

Signs of Poisoning in Dogs

Poisoning doesn’t always look dramatic. Some toxins cause signs within minutes, others only after days. Knowing the patterns helps you act fast.

Common signs your dog may be poisoned

Signs by toxin

ToxinTypical signsWhen
ChocolateVomiting, hyperactivity, racing heart, tremors6 to 12 hours
Xylitol (sugar-free gum, some peanut butters)Weakness, collapse and seizures from low blood sugar, then liver damage15 to 60 minutes
Grapes and raisinsVomiting, lethargy, reduced urineHours to 3 days
Onions and garlicWeakness, pale gums, dark urine1 to 5 days
Rat poison (anticoagulant)Bleeding, bruising, weakness, coughing3 to 7 days
Ibuprofen and naproxenVomiting (possibly bloody), black stools, kidney damageHours to days
Antifreeze (ethylene glycol)Seeming drunk, then kidney failure30 minutes, then 1 to 3 days
Cannabis (THC)Wobbly, dribbling urine, dilated pupils, sensitive to noise30 minutes to 3 hours

First aid: what to do

  1. Get your dog away from the source and keep the packaging.
  2. Call your vet, an emergency clinic, ASPCA Animal Poison Control (888) 426-4435 or the Pet Poison Helpline (855) 764-7661. Fees may apply.
  3. Do not make your dog vomit unless a professional tells you to. Some substances (caustics, petroleum products) do more harm coming back up.
  4. If your dog is seizing, collapsed or struggling to breathe, go straight to the nearest emergency vet.

Quick risk checks: chocolate, grapes and raisins, onion and garlic.

Frequently asked questions

How long does it take for a dog to show signs of poisoning?

Anywhere from minutes (xylitol, some insecticides) to several days (rat poison, onions, grapes). Never wait for signs if you know your dog ate something toxic.

Can I give milk to a poisoned dog?

No. Milk does not neutralize poisons and can make vomiting worse. Call a vet or poison line for advice.

Sources

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