If your puppy ate weed, the effects typically last 12 to 36 hours, with most dogs returning to normal within 24 hours. Symptoms usually appear within 1 to 2 hours of ingestion, though it can take up to 4 hours if your puppy hadn’t eaten recently. Right now your puppy is probably scared and confused, and the most important thing you can do is stay calm, keep them safe, and know what to watch for.
How Quickly Symptoms Appear
THC hits dogs faster than most people expect. After eating marijuana in any form, whether it’s a bud, a joint, or an edible, clinical signs show up within 1 to 2 hours. Puppies that had an empty stomach may take longer, up to about 4 hours, because the THC absorbs differently without food already in the digestive tract. If your puppy seems fine right now but you know they ate something, don’t assume you’re in the clear. The effects may simply not have kicked in yet.
What THC Looks Like in a Puppy
Dogs are far more sensitive to THC than humans. What feels like a mild buzz to a person can be genuinely disorienting and frightening for a dog, especially a puppy with a smaller body. The most common signs include:
- Stumbling or wobbling as if drunk, sometimes falling over
- Dribbling urine without seeming to notice
- Exaggerated startle response to sounds or touch
- Dilated pupils and a glazed, unfocused look
- Lethargy or sedation, ranging from drowsiness to being nearly unresponsive
- Slow heart rate
- Vomiting or drooling
Some puppies get agitated and restless instead of sleepy. Both reactions are normal responses to THC. In more serious cases, dogs may have tremors, become hypothermic (feel cold to the touch), or lose consciousness. These warrant an immediate vet visit.
Why Puppies React More Strongly Than Humans
Dogs process THC differently than people do. Their bodies metabolize it through different pathways, and researchers believe these metabolic differences are a key reason cannabis hits dogs so much harder. Dogs also have more cannabinoid receptors in their brains than humans, which amplifies the neurological effects. A puppy’s small size concentrates the dose even further. What looks like a tiny piece of an edible to you may represent a significant THC load relative to a 10- or 15-pound body.
The good news is that THC has a wide safety margin in dogs. The minimum lethal oral dose is over 3 g/kg of body weight, which is roughly 1,000 times the amount needed to cause behavioral effects. Pure marijuana flower is very unlikely to kill a dog. That said, concentrated THC products like butter or oil used in edibles can deliver much higher doses, and deaths have been reported after dogs consumed medical-grade THC butter.
Edibles Are the Bigger Danger
If your puppy ate an edible rather than raw marijuana, the THC may not be your only problem. Cannabis edibles frequently contain ingredients that are independently toxic to dogs. Chocolate is the most obvious one, but xylitol (a sugar substitute common in gummies and sugar-free baked goods) is even more dangerous. Xylitol can cause a life-threatening drop in blood sugar and liver failure in dogs, sometimes within minutes.
High-fat butter and oils used in homemade edibles also pose a risk for pancreatitis, which causes severe abdominal pain and vomiting and can require hospitalization. If you have the packaging from whatever your puppy ate, grab it before heading to the vet. Knowing the ingredient list and THC concentration helps your vet determine whether your puppy needs treatment beyond what THC alone would require.
The Recovery Timeline
Here’s roughly what to expect over the next day or two. In the first 1 to 4 hours, symptoms will emerge and intensify. Your puppy will likely become uncoordinated, glassy-eyed, and either very sleepy or unusually jumpy. This peak phase, when symptoms are at their worst, generally lasts through the first 6 to 12 hours.
From about 12 to 24 hours, most puppies begin slowly improving. They’ll start walking more steadily, show interest in water or food again, and seem more aware of their surroundings. By 24 to 36 hours, the large majority of dogs are back to normal or very close to it. Some puppies, particularly very small ones or those that ate a concentrated product, may take closer to 48 to 72 hours to fully bounce back.
If your puppy still seems significantly impaired after 36 hours, or if symptoms seem to be getting worse rather than gradually better, that’s a sign something else may be going on and a vet should evaluate them.
What You Can Do Right Now
Keep your puppy in a quiet, dimly lit room where they can’t fall off furniture or tumble down stairs. Their coordination is compromised, and even a short fall from a couch can cause injury to a wobbly puppy. Place them on a towel or puppy pad since urinary incontinence is common, and they may not realize they’re urinating.
Offer water but don’t force it. Many dogs won’t drink while symptomatic, and that’s okay for the short term. Don’t try to make your puppy vomit at home. THC causes sedation, and a drowsy puppy that vomits risks choking or aspirating the vomit into their lungs.
Check on your puppy every 30 minutes or so. You’re looking for steady breathing, a body that feels warm (not cold), and a puppy that can be roused even if they’re very sleepy. A puppy that cannot be woken up at all, has seizures, has a very slow or irregular heartbeat, or feels cold to the touch needs emergency veterinary care.
Being Honest With Your Vet
If you do go to the vet, tell them exactly what your puppy ate. Veterinarians aren’t going to judge you or report you. They need accurate information to treat your puppy quickly and avoid unnecessary (and expensive) diagnostic testing. Knowing it’s THC lets them skip the long list of other possible toxins and focus on supportive care. Without that information, they may run extensive bloodwork and imaging trying to figure out what’s wrong, which costs you time, money, and delays the right treatment for your puppy.