Cannabis and Dogs: Be Honest, It Saves Their Life

The most useful thing you can do for a dog that has eaten cannabis is tell the vet the truth. They treat animals, they do not report people.

Let us deal with the awkward part first, because it is the part that costs dogs their lives.

If your dog has got into cannabis, tell the vet exactly what it was, how strong, and how much. Your vet's job is to treat your dog. They are not interested in anything else, and they have almost certainly seen it that week already. Owners who hedge, or who say the dog "might have found something on a walk" when they know full well what happened, force the vet to guess. Guessing costs time, and time is the only thing you are actually short of.

What to do

1. Ring your vet or a poison line now, and be straight about what went in.
2. Bring the product or its packaging, so strength and other ingredients can be checked.

In the US, the Pet Poison Helpline or the ASPCA Animal Poison Control Center. In the UK, the Animal PoisonLine.

Today's cannabis is not the cannabis of twenty years ago

This matters more than people expect. A dog that eats a bit of dried plant material is in a different situation from one that gets into a concentrate.

Oils, wax, shatter and dabs can run to sixty or ninety per cent THC. At those strengths a very small amount is a real dose for a dog, and the old assumption that a bit of weed will just make a dog sleepy does not hold.

Edibles are the worst version

An edible is rarely just cannabis. It is cannabis in a brownie, and the brownie is chocolate. Or it is a sweet, and the sweet is sugar-free, which means xylitol. Or there are raisins in the flapjack, or coffee in the ganache.

That is two or three separate poisons in a single mouthful, and the cannabis is often not the one that does the most damage. So when you ring, describe the whole product, not just the active ingredient.

What you will see

• A dazed expression and glassy eyes
• Wobbliness and poor coordination
• Slow, delayed responses
• Dribbling urine, which is a classic and often the giveaway
• Drooling and vomiting
• A heart rate that is too fast or too slow
• Unusual noises, whining or crying
• Agitation in some dogs, and at the severe end, coma

The dribbling urine alongside the glassy, faraway look is the combination vets recognise immediately.

Do not make a sedated dog vomit

Do not try to make your dog sick unless you have been told to, and never when it is drowsy, wobbly or unable to hold its head up. A sedated dog can breathe vomit into its lungs, and that turns a bad night into a much worse one.

Parks, festivals and rentals

Most exposures are not the owner's stash. They are a discarded joint on a park path, a dropped edible on a festival field, or something left under the sofa of a holiday rental by whoever had it last.

Where cannabis is legal, hotel-room edibles have become a genuinely common call. Sweep a strange room before letting your dog nose around it, and on walks be quick about what your dog picks up off the ground.

The bit that surprises owners

A dog that has eaten cannabis often looks far worse than it is, and the dribbling, glassy-eyed, startled-by-noises presentation is genuinely distressing to watch in an animal that cannot be told what is happening.

It is worth knowing that they are not in pain, that it passes, and that the outcome for a dog that gets prompt care is very good. The danger sits in the concentrates and the co-ingredients, not usually in the plant itself.

Sources

This article was written using guidance from Pet Poison Helpline, a 24/7 animal poison control service for North America; and ASPCA Animal Poison Control Center, a leading 24/7 animal poison control resource in the United States. This guidance is for general information and does not replace a consultation with your own veterinarian. In an emergency, always contact a vet. Read [how we write our health guidance](https://rochsociety.com/how-we-write-our-health-guidance/). Last reviewed July 2026.