The Short Answer
Cannabis is toxic to dogs and cats at meaningful doses, and accidental ingestion by pets is one of the fastest-growing reasons for emergency-veterinary visits in cannabis-legal states. For adults 21 and older with pets, the primary concern is not whether to give cannabis to pets intentionally (don't) but preventing accidental ingestion.
Why Cannabis Is Toxic to Pets
Dogs and cats have cannabinoid receptors just like humans, but their physiology is different:
- Dogs have more CB1 receptors in the brainstem than humans, making them more susceptible to neurological effects.
- Cats are generally more drug-sensitive across most substances.
- Body weight is lower, so human doses are proportionally much larger for pets.
Signs of Cannabis Toxicity in Pets
Common signs (typically 30-90 minutes after ingestion):
- Lethargy, unsteady gait, difficulty standing.
- Dilated pupils.
- Low heart rate.
- Urinary incontinence.
- Vomiting.
- Drooling.
- In severe cases: seizures, coma.
Call a veterinarian if your pet shows these signs after suspected cannabis exposure. Most cases resolve with supportive care; severe cases require emergency intervention.
The Most Common Exposure Routes
- Edibles (gummies, chocolates, cookies). Pets eat them like regular food; a package of dog-sized pet can contain a dangerous amount.
- Flower or concentrate left accessible.
- Butts of joints or roaches on the ground during walks.
- Secondhand smoke in small enclosed spaces.
Chocolate-based edibles are doubly dangerous because chocolate is separately toxic to pets.
Prevention
- Store all cannabis products in locked containers out of pet reach.
- Clean up after yourself. Ashtrays, roaches, spills.
- Don't consume around pets in small spaces without ventilation.
- On walks, stay vigilant. Discarded joint butts in cities and parks are a hazard.
If Your Pet Ingests Cannabis
- Call your veterinarian or emergency vet immediately.
- Be honest about what was ingested. Vets won't report you; they need the information to treat.
- Bring the product packaging if you can identify it, knowing THC content informs treatment.
- Don't wait to see if it passes. Early intervention produces better outcomes.
The ASPCA Animal Poison Control Center (888-426-4435) is a 24/7 resource for suspected toxic ingestion.
What About CBD for Pets?
CBD products marketed for pets are a distinct category. Some research suggests possible benefit for some conditions (anxiety, seizures, pain) in dogs, with limited research on cats. The safety profile is generally better than THC. Key considerations:
- Use pet-specific formulations, not human products (human products may contain THC, xylitol, or other dog-toxic ingredients).
- Talk to a veterinarian first.
- Lower doses than human equivalents.
- Third-party testing matters for quality.
What You Should Not Do
- Do not intentionally give THC-containing products to pets. This is not a treatment; it is a poisoning.
- Do not self-medicate pets with human cannabis products.
- Do not wait to see if a severely affected pet "sleeps it off."
Where to Go Next
Related reading: responsible cannabis use tips, how to store cannabis properly, and edibles 101.
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*This article is consumer education for adults 21+. Nothing here is medical, legal, or financial advice. Cannabis laws vary by state, always verify your state's current rules and, for health questions, consult a licensed clinician. For regulated New York retail, verify licensing via the OCM QR-code system at cannabis.ny.gov.*