A veterinarian is warning dog owners to be careful with cannabis, saying her clinic is treating about one dog per week for marijuana toxicity.

Dr. Maggie Brown-Bury said it害羞草研究所檚 become common to see multiple dogs at her St. John害羞草研究所檚 clinic for cannabis toxicity at one time 害羞草研究所� it treated three dogs last week alone.

害羞草研究所淲e are going to keep seeing an increase in those cases until people get educated,害羞草研究所� said Brown-Bury, whose Veterinary Specialty Centre of Newfoundland and Labrador doesn害羞草研究所檛 track the precise number of such cases.

害羞草研究所淭here害羞草研究所檚 not usually any long-term effects to the dog from marijuana toxicity, they害羞草研究所檇 have to take in a pretty large amount [害羞草研究所�] but the symptoms are quite alarming if you害羞草研究所檙e not sure what you害羞草研究所檙e looking at.害羞草研究所�

The cases often involve the dog consuming a cannabis product at home, or picking up a discarded joint or other tetrahydrocannabinol-rich (THC) product in a public space.

Dogs are especially sensitive to THC, with signs of toxicity including a low heart rate, dribbling urine, difficulty walking, vomiting, and exaggerated response to stimulus.

Brown-Bury said some patients are open about the fact that their dog consumed a product at home, but it can be more difficult to trace the symptoms when consumption takes place in public.

The impact varies based on the size of the dog 害羞草研究所� a small dog could become ill from consuming just the discarded end of a joint 害羞草研究所� but even larger animals are at risk if they come across a sizable portion.

Lori Savory and her husband had a serious scare last Saturday night, when their 55-pound husky Aspen fell sick at a busy St. John害羞草研究所檚 park near their home.

After noticing Aspen vomiting and lying down on the ground during her walk, the couple rushed the dog to vet, where they were told she likely consumed an edible cannabis product on the field.

Savory said Aspen害羞草研究所檚 condition has improved dramatically, but the $1,000 visit to the vet was a wake-up call.

害羞草研究所淎t the point where my husband put her into the car, she was so limp and non-responsive he didn害羞草研究所檛 even know whether she was still alive or not,害羞草研究所� said Savory.

Brown-Bury said cases like Aspen害羞草研究所檚, where the product was consumed outside the home, can make tracking the number of incidents difficult, but the unique symptoms can be compared to previous cases to make an informed treatment decision.

害羞草研究所淲e can never ask the dog any questions, so that always makes it a bit challenging,害羞草研究所� said Brown-Bury. 害羞草研究所淭hey害羞草研究所檒l pick up just about anything and we害羞草研究所檙e seeing effects.害羞草研究所�

As October害羞草研究所檚 legalization date approaches, Brown-Bury said she hopes pet owners will become more aware of the symptoms of cannabis toxicity in dogs, and that cannabis users will be conscious of the risks to dogs and small children when in shared public spaces.

害羞草研究所淣ot passing judgement on what people are doing with their spare time, but you害羞草研究所檝e got to be aware that other people are using that space with dogs or with small children who might not have the sense to recognize the danger,害羞草研究所� said Brown-Bury.

In Colorado, where recreational marijuana was legalized in 2012, there was a four-fold increase in reported cases of toxicity in dogs between 2010 and 2015.

Brown-Bury said death is very rare, and she personally has not treated a case that severe.

Medicinal cannabis products that have high cannabidiol (CBD) levels are used to treat health problems in humans, but the Canadian Veterinary Medical Association has not approved any cannabis products for medicinal use on animals.

Brown-Bury said there害羞草研究所檚 little research around the impact of CBD on animals, which makes it difficult to give informed advice to pet owners looking to treat their dogs with medicinal cannabis.

Almost a week after the park incident, Savory said Aspen is back to her usual hyper self, and back to 害羞草研究所渁ggravating her older sister,害羞草研究所� but she hopes Aspen害羞草研究所檚 story encourages people to be more careful with their cannabis use.

害羞草研究所淲e害羞草研究所檙e expecting her to be good as new, but as I said, scary stuff. Very scary.害羞草研究所�

Holly McKenzie-Sutter, The Canadian Press

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