Why are dogs so affected by THC?
Dogs have more cannabinoid receptors in their brain, making them much more sensitive to THC than humans. Poisoning is rarely fatal on its own, but edibles add serious risks: chocolate toxicity, xylitol, raisins, or packaging. Symptoms can last 24–72 hours.
Why speed matters
Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.
Symptoms of marijuana poisoning
- Wobbliness, appearing "drunk", dilated pupils
- Lethargy or, less often, agitation and aggression
- Vomiting, drooling, low heart rate or low temperature
- Urinary incontinence
- Severe: tremors, seizures (rare, usually with edibles)
What to do right now
- Tell your vet honestly what was eaten — including whether it was an edible, and its THC content if known.
- Watch for edible co-toxins (chocolate, xylitol, raisins) — check those calculators too.
- Keep the pet warm and calm; most cases recover with supportive care in 24–72 h.
- Call if symptoms are severe, worsening, or the pet has a medical condition.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.
Sources & further reading
- ASPCA Animal Poison Control — pet poison database & dosage references
- Pet Poison Helpline — toxicology triage guidelines
- Merck Veterinary Manual — toxicology monographs
- Vets Now (UK) — emergency toxicosis guidance