Can Dogs Have Weed? What Happens If They Eat It
If your dog has eaten weed, an edible or another product containing THC, do not wait for them to become noticeably unwell before seeking advice. Cannabis containing THC can cause poisoning in dogs, and the effects depend on factors such as the amount consumed, THC concentration, product type and your dog's individual exposure.
Dogs affected by THC can become unusually sleepy, unsteady on their feet or disoriented. Vomiting, trembling, urinary incontinence and changes in heart rate or body temperature can also occur. Most affected dogs recover with appropriate care, but suspected exposure deserves proper assessment rather than being treated as something the dog simply needs to sleep off.
What to Do If Your Dog Eats Weed
Start with the information you can gather safely. What the dog ate, how much may be missing and whether other ingredients were involved can all influence the advice you receive.
In Australia, you can contact your veterinarian or the Animal Poisons Helpline on 1300 869 738. The service is available 24 hours a day for Australian pet owners.
Remove Any Remaining Cannabis From Reach
Take away anything your dog could still access, including loose cannabis, joints, edibles, oils, packaging or discarded material.
If other pets are nearby, prevent them from reaching the same source as well. Do not throw away useful packaging immediately. A packet or label may contain information about THC content or other ingredients that helps with the risk assessment.
Check What Your Dog May Have Eaten
Try to establish:
- what type of cannabis product was involved;
- roughly how much is missing;
- when the exposure may have happened;
- whether your dog has already developed any unusual signs;
- the labelled THC content, if available;
- what other ingredients the product contains.
You do not need perfect information before asking for help. Give the veterinarian or poison service what you know rather than delaying while trying to calculate the exposure yourself.
Contact a Vet or Animal Poisons Service
Professional advice is useful even if your dog currently appears normal. The Animal Poisons Helpline specifically recommends contacting the service when a pet has accessed marijuana so the exposure can be assessed and appropriate first-aid advice provided.
Veterinary management depends on the dog's condition. Current veterinary guidance describes treatment for THC toxicosis as primarily supportive. A clinically affected dog may need monitoring, fluids, temperature management, treatment for nausea or other supportive measures depending on the signs present.
Signs Your Dog May Be Affected by Weed
THC acts on the nervous system, and dogs can show a combination of neurological, gastrointestinal and cardiovascular signs after exposure.
Commonly reported signs include lethargy, poor coordination and vomiting. Dogs may also develop urinary incontinence, trembling, dilated pupils, increased sensitivity to movement or sound, agitation, twitching or changes in body temperature and heart rate.
Changes in Coordination and Alertness
One of the more recognisable patterns is a dog that seems unusually sleepy or has difficulty walking normally.
The Australian Animal Poisons Helpline also identifies wobbliness, disorientation, reduced alertness, dilated pupils and urinary incontinence among signs seen with marijuana poisoning.
Those signs can overlap with other medical problems. If cannabis exposure is possible, tell the veterinarian or poison service directly. A clear exposure history is more useful than trying to identify THC poisoning from behaviour alone.
When Symptoms Need Urgent Veterinary Attention
More serious THC effects are uncommon, but respiratory depression, substantial cardiovascular effects and seizures have been reported.
A dog that is severely depressed, cannot stand normally, is having seizures, has difficulty breathing or otherwise appears seriously unwell needs prompt veterinary assessment.
Do not rely on the apparent size of the cannabis product to determine severity. THC concentrations vary substantially between plant material, oils, concentrates and edibles.
How to Get a Dog Sober From Weed
There is no useful home shortcut for making a dog "sober" from THC.
Current veterinary guidance focuses on monitoring and supportive care while the body processes the THC. What that involves depends on how affected the dog is. Mild and severe cases should not automatically be managed in the same way.
Do not give food, medication, supplements or another cannabis product in an attempt to counteract the exposure unless a veterinary professional specifically instructs you to do so.
You also should not make your dog vomit on your own. Veterinary decontamination may be considered in particular circumstances shortly after ingestion, but Merck specifically limits consideration of induced vomiting to dogs that are still clinically normal. Once neurological signs develop, management changes because aspiration and other complications become concerns.
The useful action is therefore not finding a way to reverse the "high" at home. It is getting advice based on the actual product, estimated exposure and your dog's current condition.
How Long Does a Weed High Last for Dogs?
The effects are not necessarily brief.
After oral THC ingestion, clinical signs commonly begin within about one to two hours, although onset can take longer in some circumstances. In significantly affected dogs, signs can persist for one to three days.
That range is not a countdown that tells you when a dog is safe. The severity and duration depend on the exposure and the individual animal.
A dog that remains very sleepy, poorly coordinated or otherwise abnormal still needs appropriate monitoring and veterinary guidance even if several hours have passed.
Current veterinary evidence indicates that the prognosis is generally good with appropriate supportive care, and death from THC exposure is considered extremely rare. That does not mean every exposure can safely be watched at home without assessment.
How Much Weed Is Dangerous for a Dog?
There is no practical household amount that should be treated as universally safe.
The amount of THC in cannabis products varies widely. Plant material, hash, oils and concentrated products can contain very different THC concentrations, while edibles add another layer of uncertainty because the amount consumed may be difficult to establish accurately.
Veterinary evidence also shows that dogs can develop clinical signs at relatively low THC exposures. At the same time, the exact dose a dog has received is often difficult to calculate because product consistency and concentration vary.
That means a useful risk assessment needs more than the statement that a dog ate "a little weed". Relevant details include the dog's size, the product, concentration, quantity potentially consumed, timing and any symptoms already present.
If you are uncertain about the amount, that uncertainty itself is a reason to contact a veterinarian or the Animal Poisons Helpline rather than trying to establish a safe threshold from an online estimate.
Why Cannabis Edibles Can Create Additional Risks
A cannabis edible can expose a dog to more than THC.
Brownies, chocolates, gummies and other human foods may contain ingredients that have their own toxicity concerns. Chocolate can cause potentially serious cardiovascular and nervous-system effects in dogs, while xylitol found in some sugar-free foods can cause severe hypoglycaemia and, at higher exposures, liver injury. Grapes, raisins and sultanas are another established food hazard for dogs.
This is why the exact product matters.
Check the Full Ingredient List
If the original package is available, keep it with you when speaking to the veterinarian or poison service.
Look for:
- THC or cannabis information;
- serving size and concentration;
- chocolate or cocoa;
- xylitol or other sweeteners;
- raisins or sultanas;
- any other active ingredients.
Do not assume THC is the only concern simply because cannabis is the most obvious ingredient.
How to Prevent Your Dog From Getting Into Weed
Prevention needs to account for how dogs actually behave, not just where people normally keep cannabis.
A packet sitting high on a coffee table may appear inaccessible until a dog pulls it down. A handbag left on the floor, an edible in a backpack or discarded material in an open bin can create the same problem.
Store Cannabis Where Your Dog Cannot Reach It
Use closed storage that your dog cannot access rather than relying only on height.
That applies to:
- dried cannabis;
- joints;
- oils and concentrates;
- gummies;
- baked edibles;
- other THC-containing products.
The Australian Animal Poisons Helpline advises keeping recreational drugs well out of pets' reach.
Visitors matter too. A careful household storage routine does not help if cannabis is left in an accessible bag, jacket or container by someone else.
Treat Edibles Like Other Potentially Harmful Human Foods
Edibles can be particularly tempting because they may smell like ordinary food.
Return them to secure storage immediately after use and dispose of leftovers or packaging where a dog cannot retrieve them. If you discover an empty packet, check the ingredient list before assuming cannabis was the only exposure.
There is also a clear distinction between a cannabis theme and actual cannabis. If you like the joke but want it kept completely separate from the real substance, a spliff dog toy can keep that reference in the toy box while real cannabis remains securely stored away from your dog.
The toy does not change the safety rule: THC-containing cannabis should remain inaccessible to pets.
Practical Takeaway
If you suspect your dog has eaten weed, concentrate on what will help with the assessment. Stop further access, keep the packaging, work out what may have been consumed and contact a veterinarian or the Australian Animal Poisons Helpline.
Do not wait for a particular symptom, try to calculate a "safe" amount or rely on a home method to make your dog sober. The product and exposure matter, and early professional advice gives you a clearer basis for deciding what your dog needs.