Poisoning in Dogs - Symptoms, First Aid and Prevention

Poisoning is one of those moments where every minute counts and panic is the worst adviser. A dog sniffs and samples everything along the way, so contact with a dangerous substance happens more often than we'd like to think - from a square of chocolate dropped off the table to poison bait in the bushes. Below we explain how to recognise poisoning, what to do straight away, what you absolutely must not do, and how to lower the risk in future.

The most common causes of poisoning in dogs

Poisoning doesn't always mean deliberate poisoning. Far more often it's accidental contact with something ordinary to us but toxic to a dog. The most common sources:

• Toxic foods - chocolate, xylitol (a sweetener in gum and sweets), grapes and raisins, onion and garlic, alcohol, raw yeast dough.
• Human medicines - painkillers and anti-inflammatories, sleeping pills, supplements; many are dangerous even in a small dose.
• Poisons - rodent and slug products are designed to attract and kill, so they can be fatal to a dog.
• Household chemicals - detergents, antifreeze (glycol), garden pesticides.
• Plants - some popular houseplants and garden plants are toxic to dogs.

For more on dangerous foods, see our guide on foods toxic to dogs.

Symptoms of poisoning in dogs

Symptoms depend on the substance, the dose, and the size of the dog, but certain signs should always raise the alarm. The table below helps gauge the scale of the problem.

Symptom	What it may point to
Vomiting and diarrhoea	A gut reaction, common in many poisonings
Excessive drooling	An irritant or corrosive substance, nausea
Lethargy, weakness	General poisoning of the body
Muscle tremors, seizures	Neurotoxic poisoning, including some poisons
Unsteady gait, disorientation	Effect on the nervous system
Rapid breathing and heart rate	Reaction to a toxin, pain, stress
Pale or yellowed gums	Blood or liver damage
Blood in vomit or stool	Gut damage, clotting disorders

Important: no symptoms right after swallowing doesn't mean it's safe. Some poisons (such as certain rodent products) only cause signs after hours or days. If you know or suspect your dog has had contact with a poison, act before symptoms appear.

When to see a vet urgently

Poisoning is always a potential emergency. Get to the vet immediately if:

• you saw or suspect your dog swallowed poison, medicine, or a known toxic food,
• your dog has seizures, is trembling, disoriented, or losing consciousness,
• it's vomiting heavily or has diarrhoea, especially with blood,
• it's struggling to breathe, or has pale or yellowed gums,
• it's extremely weak or lethargic.

Before you set off, call the clinic or a 24-hour practice so staff can prepare for your arrival. This is not a situation where you wait until morning - in poisoning, time often decides the outcome. This article helps you assess the danger, but diagnosis and treatment are led by a vet alone.

First aid - what to do and what not to do

It's easy to make a mistake under stress, so stick to simple rules.

What to do:

1. Stay calm and move the dog away from the source - remove any leftover substance, block access to it.
2. Call the vet at once - describe what your dog may have swallowed, how much, and when.
3. Secure the evidence - packaging, label, medicine leaflet, a sample of plant or vomit.
4. Go to the clinic as the specialist instructs.

What not to do:

• Don't induce vomiting on your own - with corrosive or petroleum substances this makes things worse.
• Don't give milk, oil, salt, or home concoctions - these are myths that can do harm.
• Don't wait for symptoms to pass on their own - in poisoning that's a dangerous waste of time.
• Don't give any human medicines - many are themselves toxic to dogs.

For more general principles, see our guide on dog first aid.

How to prevent poisoning

Most poisonings can be avoided with simple prevention at home and on walks:

• Keep medicines, chemicals, and toxic foods out of a dog's reach, including in guests' bags.
• Don't leave chocolate, gum, and sweets containing xylitol at muzzle height.
• On walks, work on the "leave it" cue and respond to scavenging off the ground.
• Watch out for places where poison bait may have been laid, such as near bins or in cellars.
• Know the plants in your home and garden and their potential toxicity.

The "leave it" cue is one of the most important skills for protecting a dog from picking up dangerous things - well worth practising from puppyhood. If you're looking for calmer, tried-and-tested routes away from littered corners, take a look at the DOGOUT map and use spots recommended by other owners.

Summary - the key things to remember

Poisoning in a dog is a race against time, where composure and a fast response matter most. Remember: at any suspicion of poisoning you call the vet and go to the clinic, you don't induce vomiting yourself, and you don't try to save the dog with home concoctions. The best protection, though, remains prevention - the fewer chances of contact with a poison, the lower the risk that you'll ever have to act in a panic.