Keeping Pets Safe Around Cannabis: Toxicity Signs and What to Do

As cannabis becomes a household staple in millions of American homes, veterinary emergency rooms are seeing a parallel trend that deserves serious attention: a sharp increase in cannabis toxicity cases in pets. The ASPCA Animal Poison Control Center has reported that cannabis-related calls have increased by over 300% in the past five years, with the majority involving dogs who have consumed edible cannabis products.

This is not a niche concern. If you have cannabis in your home and you have pets, understanding the risks, recognizing the symptoms, and knowing how to respond could save your animal’s life.

Why Pets Are Vulnerable

Dogs and cats have endocannabinoid systems, just like humans. However, their systems are structured differently, and they are significantly more sensitive to THC than people are. Dogs in particular have a higher density of cannabinoid receptors in their brains compared to humans, which makes them more susceptible to THC’s effects at much lower doses.

The toxic dose of THC for dogs is not precisely established, but clinical reports suggest that serious symptoms can occur at doses as low as 1-3mg of THC per kilogram of body weight. For a 20-pound dog, that translates to roughly 9-27mg of THC — well within the range of a single commercial edible, which typically contains 10-100mg of THC per unit.

Cats are exposed less frequently, largely because cats are more selective eaters than dogs. However, cats can be affected by inhalation of cannabis smoke in enclosed spaces, and curious kittens may chew on plant material or discarded products.

The Edible Problem

The majority of serious veterinary cannabis toxicity cases involve edibles, and the reason is straightforward: edibles combine THC with ingredients that dogs find irresistible. Chocolate brownies, gummy candies, cookies, and infused butter all smell and taste appealing to dogs. A dog that might ignore a bag of dried flower will enthusiastically devour a tray of cannabis gummies or a container of cannabutter.

The combination of THC with chocolate creates a double toxicity risk, since chocolate is independently toxic to dogs. A dog that consumes chocolate cannabis edibles needs treatment for both THC and theobromine poisoning simultaneously.

Edibles also deliver THC through the digestive system, which means effects are delayed but prolonged compared to inhalation. A dog that eats an edible may not show symptoms for 30-90 minutes, and the effects can persist for 12-36 hours in severe cases.

Recognizing Symptoms of Cannabis Toxicity in Dogs

The symptoms of cannabis toxicity in dogs range from mild to severe depending on the dose relative to body weight. Here is what to watch for:

Mild to Moderate Symptoms

• Lethargy and sedation: The dog appears unusually drowsy or unresponsive to stimulation
• Loss of coordination (ataxia): Stumbling, swaying, inability to walk in a straight line. This is often the first noticeable sign
• Dilated pupils: Eyes appear wider than normal with an exaggerated response to light
• Urinary incontinence: The dog may dribble urine or urinate in unusual places
• Hypersensitivity to sound or touch: Startling at normal noises, flinching when touched
• Drooling or dry mouth: Excessive salivation in some dogs, dry mouth in others

Severe Symptoms

• Pronounced hypothermia: Body temperature dropping below normal range
• Tremors or seizures: Involuntary muscle movements or full seizure activity
• Vomiting: Especially concerning if the dog is also lethargic, as aspiration (inhaling vomit) is a life-threatening risk
• Bradycardia: Abnormally slow heart rate
• Extreme unresponsiveness: The dog cannot be roused, appears comatose

Signs in Cats

Cats may show similar symptoms but often present differently:

• Excessive grooming or complete cessation of grooming
• Unusual vocalization or silence
• Agitation and hiding behavior
• Dilated pupils and disorientation
• Drooling

What to Do If Your Pet Ingests Cannabis

Step 1: Stay Calm and Assess

Determine what the pet consumed, approximately how much, and how long ago. This information will be critical for the veterinarian. If packaging is available, note the THC content per serving and the number of servings in the product.

Step 2: Call Your Veterinarian or Emergency Animal Hospital

Do not wait to see if symptoms develop. Early intervention improves outcomes. If your regular veterinarian is not available, contact the nearest emergency animal hospital. You can also call the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee applies) or the Pet Poison Helpline at (855) 764-7661.

Be honest with the veterinary team about what the pet consumed. Veterinary professionals are not law enforcement, and withholding information about cannabis exposure can delay appropriate treatment and put the animal at greater risk. In legal states, veterinarians report that owner reluctance to disclose cannabis exposure has decreased but has not disappeared entirely.

Step 3: Do Not Induce Vomiting Unless Directed

While inducing vomiting can be appropriate for some toxin exposures, it is not always recommended for cannabis. If the dog is already showing neurological symptoms (incoordination, sedation), inducing vomiting increases the risk of aspiration. Only induce vomiting if specifically directed to do so by a veterinary professional, and only if the ingestion occurred within the past 30-60 minutes and the dog is still alert and coordinated.

Step 4: Provide Supportive Care

While awaiting veterinary care:

• Keep the pet warm and comfortable
• Place the pet on a soft surface in case of seizures
• Prevent access to stairs where a disoriented animal could fall
• Monitor breathing
• Do not offer food or water to a lethargic or uncoordinated animal

Veterinary Treatment

Treatment for cannabis toxicity in pets is primarily supportive, as there is no specific antidote for THC.

Decontamination: If the pet is presented early and is still alert, the veterinarian may induce vomiting and administer activated charcoal to reduce further absorption.

IV fluids: Intravenous fluid therapy supports kidney function and helps maintain blood pressure.

Temperature regulation: Warming measures for hypothermic animals.

Anti-nausea medication: To control vomiting and reduce aspiration risk.

Monitoring: Heart rate, respiratory rate, temperature, and neurological status are monitored until the animal recovers.

The prognosis for cannabis toxicity in dogs is generally excellent with appropriate veterinary care. Fatal outcomes are rare but not unheard of, particularly in very small dogs exposed to large doses, or in cases involving concurrent chocolate or xylitol toxicity from edible products.

Prevention: Cannabis-Proofing Your Home

Prevention is infinitely preferable to emergency treatment. If you use cannabis in a home with pets, adopt these practices:

Store all cannabis products in sealed, pet-proof containers. Child-proof containers serve double duty here. Cannabis flower, edibles, concentrates, and infused ingredients should all be stored where animals cannot access them — inside closed cabinets or on high shelves, not on countertops or coffee tables.

Be especially careful with edibles. Treat cannabis edibles with the same caution you would treat medications. A bag of cannabis gummies left in a purse on the floor is an invitation for a curious dog. Infused butter or oil cooling on the counter is equally accessible.

Secure trash and compost. Discarded cannabis packaging, used cartridges with residual oil, and infused food scraps can all attract pets. Use trash cans with secure lids.

Ventilate when smoking or vaporizing. While secondhand cannabis smoke is less commonly associated with toxicity than direct ingestion, small animals in poorly ventilated spaces can be affected. Smoke in a room your pets do not occupy, or use a well-ventilated area.

Educate guests. If visitors bring cannabis into your home, let them know about your pets and ask that they keep products secured. Parties and social gatherings — where cannabis products may be more casually distributed and monitored — represent elevated risk for accidental pet exposure.

Consider your garden. If you grow cannabis at home, ensure that pets cannot access the plants. While raw cannabis plant material is less toxic than concentrated THC products, ingestion of plant material can still cause gastrointestinal distress.

The CBD Question

CBD products for pets have gained significant popularity, and many veterinarians have become more open to discussing CBD’s potential therapeutic applications for animals, including anxiety management and pain relief. However, CBD products marketed for humans should never be given to pets without veterinary guidance, as they may contain THC levels that are safe for humans but problematic for animals.

Pet-specific CBD products exist and are formulated with appropriate dosing for animal body weights. If you are interested in CBD for your pet, consult with a veterinarian who is knowledgeable about cannabinoid therapeutics.

Bottom Line

Cannabis and pets can coexist safely in the same household, but it requires the same kind of deliberate precaution that you would apply to any household substance that is safe for adults but dangerous for animals. Store securely, consume responsibly, and know what to do if an accident happens. Your veterinarian is your best resource, and honesty about cannabis exposure is always the right call.