There is no marijuana product designed for dogs, and THC (the compound in weed that produces a high) is toxic to them. However, hemp-derived CBD products formulated specifically for dogs do exist and are widely sold. The distinction matters: THC can make a dog seriously ill, while CBD from hemp contains virtually no THC and has a much safer profile in canines.
Why Regular Weed Is Dangerous for Dogs
Dogs are far more sensitive to THC than humans. They can develop symptoms from doses as low as 0.3 to 0.5 milligrams of THC per kilogram of body weight, which means even a small piece of an edible can affect a 20-pound dog. Signs of THC poisoning typically start within 30 minutes to a few hours after exposure and can last up to 72 hours. That’s a long, miserable experience for a dog who has no idea what’s happening to its body.
Common signs include difficulty walking or standing, extreme sedation, a dazed or “glassy-eyed” look, dilated pupils, drooling, vomiting, and urinary incontinence. Some dogs become hypersensitive to sound and touch, flinching or startling at normal stimuli. In more serious cases, dogs can develop tremors, changes in heart rate and blood pressure, difficulty regulating body temperature, or seizures. Coma is possible with large exposures, though death from THC alone is extremely rare. The probable lethal dose requires an enormous amount of plant material (3 to 9 grams per kilogram of body weight), far more than a dog would typically find lying around.
The real danger often isn’t the THC itself. Edibles frequently contain chocolate, the sugar substitute xylitol, butter, or other ingredients that are independently toxic to dogs. A pot brownie, for instance, delivers a double hit of THC and chocolate toxicity. Pet Poison Helpline has reported a 448 percent increase in marijuana-related calls in recent years, driven largely by the growing availability of edibles in homes.
Hemp CBD Products for Dogs
What does exist for dogs is a booming market of CBD products derived from hemp. These are legal under federal law as long as they contain less than 0.3 percent THC, a trace amount that doesn’t produce psychoactive effects. CBD itself doesn’t get dogs high. It interacts with the body’s endocannabinoid system differently than THC and lacks the intoxicating properties.
Safety data from Cornell University’s veterinary college shows that CBD doses up to 10 milligrams per kilogram per day have been given to dogs for up to 36 weeks with a largely safe profile. The National Animal Supplement Council tracked adverse event reports and found fewer than two reports per one million products sold each year over the past decade. When side effects do occur, they tend to be mild: vomiting, diarrhea, sleepiness, or minor behavior changes.
Dog owners use CBD products for joint discomfort, anxiety, and general wellness, though regulation of the pet supplement market is still loose. Product quality varies, and some CBD products marketed for pets have been found to contain more THC than their labels claim. Buying from brands that provide third-party lab testing helps reduce that risk.
What Happens if Your Dog Gets Into Weed
One complicating factor is that standard urine drug tests don’t work on dogs. Human drug screens look for a specific THC byproduct called THC-COOH, which humans produce in large quantities but dogs barely make at all. Dogs break down THC through different metabolic pathways, producing different compounds that these tests can’t detect. In one study, zero out of 25 urine tests came back positive in dogs with suspected THC exposure. Another found only 1 positive result out of 21 tests. So a negative drug screen doesn’t rule out THC ingestion in a dog.
Veterinarians typically diagnose THC toxicity based on the dog’s symptoms and the owner’s honesty about what the dog may have eaten. Being upfront with your vet speeds up treatment and avoids unnecessary (and expensive) testing for other causes. Vets aren’t law enforcement, and they’ve seen it all before. Treatment is supportive: keeping the dog hydrated, comfortable, and monitored until the THC works its way out of the system. Most dogs recover fully within 24 to 72 hours.
Keeping Dogs Safe
Dogs are indiscriminate eaters, and cannabis products are increasingly common in households. Edibles smell appealing to dogs. Discarded joints or roaches on sidewalks are easy to snatch up during a walk. If you keep any cannabis products at home, store them the way you’d store medications: in a closed container, out of reach, ideally behind a door or in a cabinet. This applies to flower, edibles, vape cartridges, and concentrates alike.
If you’re interested in giving your dog a cannabis-related product for health reasons, stick to hemp-derived CBD formulated for pets, not anything containing meaningful levels of THC. The two compounds come from the same plant family but have very different safety profiles in dogs.