How Much Cannabis Is Toxic to Dogs? THC Dose Guide

Any cannabis product that contains THC can be toxic to a dog. There is no safe amount. Veterinary toxicologists report clinical signs at doses near 2 to 3 milligrams of THC per kilogram of body weight, and higher doses can cause severe or fatal outcomes. If you buy cannabis online, the core safety step is to choose products with child-resistant and pet-resistant packaging, store them in a locked container, and keep the THC content label so you can tell a vet exactly what your dog may have eaten.

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How Much Cannabis Is Toxic to Dogs? Short Answer

The toxic dose depends on THC concentration, the dog's weight, and the form of the product. Chocolate edibles add a second poison risk because chocolate is also toxic to dogs. A 10 kg (22 lb) dog that eats a single 10 mg THC edible has received 1 mg/kg, which can cause lethargy and vomiting. A 50 mg edible given to the same dog is 5 mg/kg, a dose linked to tremors and worse.

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Dose Bands for THC in Dogs

• Under 1 mg/kg: mild signs possible, including sleepiness, unsteady walking, vomiting.
• 1 to 3 mg/kg: common toxic range. Expect lethargy, dilated pupils, low heart rate, dribbling urine.
• 3 to 10 mg/kg: severe signs. Tremors, seizures, coma, low body temperature.
• Above 10 mg/kg: life-threatening. Immediate veterinary care is critical.

These bands are approximate. Individual dogs vary. Call a vet for any ingestion.

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What to Look For When Buying Cannabis If You Have a Dog

Buy from brands that publish third-party lab results for THC potency. Choose packaging that is opaque, resealable, and hard for a pet to chew through. Avoid leaving pre-rolls, vape carts, or loose flower on low tables. For edibles, pick products with clear per-piece dosing, not a single giant dose. Keep a written log of what you buy and the THC milligrams per item.

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Parameter Bands to Check on Any Product Label

• THC per piece: 1 to 10 mg is common. Higher per-piece doses raise the risk if a dog eats one unit.
• Total THC per package: a 100 mg package can be a lethal-sized load for a small dog.
• CBD to THC ratio: CBD does not cancel THC toxicity. A high-CBD product with THC still poisons dogs.
• Food additives: xylitol, chocolate, raisins, and macadamia nuts are also toxic. Check the ingredient list.

Common Pitfalls

1. Assuming only edibles are dangerous. Vape oil, tinctures, and flower can all poison a dog.
2. Waiting for symptoms. Dogs can look fine for 30 to 60 minutes, then decline fast.
3. Inducing vomiting without vet guidance. This can cause aspiration pneumonia.
4. Giving activated charcoal at home. This is a vet procedure, not a home remedy.
5. Trusting the pet-safe label on a cannabis product. No cannabis product is pet-safe.

FAQ

How much cannabis is toxic to dogs? Any THC dose above 0 mg is a risk. Clinical toxicity often starts near 2 mg/kg. A 20 lb dog (9 kg) that eats 20 mg of THC has received about 2.2 mg/kg.

Can a dog die from cannabis? Yes. Death is rare but possible, mainly with large edible doses, concentrated extracts, or when chocolate or xylitol is also present.

What should I do if my dog ate cannabis? Call your vet or a pet poison hotline right away. Do not wait. Bring the product label or the package so the vet knows the THC amount.

Does CBD oil poison dogs? CBD products with THC can poison dogs. Even hemp-derived CBD may contain small amounts of THC. Check the certificate of analysis.