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Cannabis and Pets. 

Medical marijuana is legal in 29 states and in Washington, DC.

Legal for people, that is, not pets.

As far as the medicinal benefits of marijuana for pets go, the jury is still out. In fact, there hasn’t even been a trial. 

California was the first state to legalize pot for medicinal use in 1996 and in January is slated to become one of the latest states to legalize the sale of pot for recreational use. Peyton said that between increasing use of medical cannabis nationwide and the upcoming launch of recreational use in the Sunshine state, interest in using marijuana medicinally for pets is growing. 

According to UC Davis, very little is known about what role or use cannabis may play in the health and wellbeing of companion animals. Currently, no states allow veterinarians to prescribe or recommend cannabis products for pets. Some questions veterinarians want to know. 

  • Why does your pet need a cannabis product?
  • What is the name of the hemp/cannabis product?
  • Is the amount of Cannabidiol (CBD), Tetrahydrocannabinol (THC), or other cannabinoids in product listed?

CBDs and THCs are the major players in the composition of marijuana, and the main difference between the two is that THCs will get you high while CBDs won’t. CBDs also have significant medical benefits, which is why they’re of such interest to both researchers and pet owners.

In states that have legalized recreational marijuana, pet owners can buy biscuits and other products containing nonpsychoactive cannabinoid compounds (e.g., CBD), and anecdotal reports indicate that some find cannabis products helpful for pain, arthritis, seizures, or anxiety in both dogs and cats.

No wonder pet owners are interested. And wary. 

According to a 2016 study on marijuana toxicity in pets conducted in Colorado, a state where both medicinal and recreational marijuana use is legal, two dogs that ate baked products made with medical grade marijuana died. But THC, not CBD, was the active cannabinoid in both cases.


And they’re letting you know they know. Just look at those puppy dog eyes.Scientists at the University of Portsmouth’s Dog Cognition Center have found clear evidence that dogs change their expressions in direct response to human attention.

Previous studies have suggested that the facial expressions of non-human primates like orangutans and gibbons vary more when people are around, especially during play, indicating that those expressions are not necessarily an automatic response but a direct response to having an audience. But the Portsmouth study is the first to find a link between dogs’ facial expressions and the presence of people.

The study’s lead researcher, Dr. Juliane Kaminski, said, “The findings appear to support evidence that dogs are sensitive to humans’ attention and that expressions are potentially active attempts to communicate, not simple emotional displays.”

They discovered that the dogs produced more facial expressions when the humans were facing them than when they turned away, with or without holding food.

Eye contact was the key.

Which means that when a dog makes a face at you, she may be trying to communicate.

The most common expression produced by the dogs during the study was brow raising. Brow raising makes the eyes look bigger, producing the effect of so-called puppy dog eyes.

In humans, puppy dog eyes can resemble sadness. In dogs, it can make their eyes appear larger and more baby-like. That could tap into human’s preference for child-like characteristics, making us especially responsive to that expression in dogs.

After all, people make puppy dog eyes at you when they want something. So it’s no surprise that puppies do it, too.


Walking your dog can save your life, depending on how long your walk is.

Just 30 minutes of physical activity a day, five days a week, can prevent one in twelve deaths. That’s the conclusion drawn from one of the largest studies ever done of the benefits of moderate physical activity.

And you don’t even have to break a sweat.

The study published last week in the British medical journal The Lancet, analyzed data from more than 130,000 people in seventeen countries across all income levels over an average of seven years.

Past research has shown that physical activity has a protective effect against cardiovascular disease (CVD) in high-income countries. In those countries, that physical activity is mainly recreational. In the new study, researchers wanted to find out if that same protective effect could be observed in lower-income countries, where physical activity is mostly nonrecreational—countries where people didn’t necessarily work out or belong to a gym, but got their physical activity in during the course of a regular day, like walking to work or simply being active around home doing chores.

During the course of the study, researchers found that people who reported two-and-a-half hours of physical activity per week were much healthier than their sedentary counterparts. They were less likely to have heart attacks, strokes, and cardiovascular disease.

In fact, they were less likely to die from any cause.

Getting 150 minutes of weekly exercise was associated with a 28 percent reduction in premature death and a 20 percent reduction in heart disease.

If you’re a dog owner, it’s likely you’re already seeing the health benefits. Dog owners typically walk an average of 300 minutes a week or around 43 minutes per day. So, if you’re like most dog owners, you’re ahead of the game by150 minutes a week.


Many studies have studied the behavior of dogs and their connections to people but not all attempt to explain the genetic basis for this behavior.

A new study published on July 19 in the online journal Science Advances suggests that it has located one genetic marker that reveals hypersociability in dogs. Using the genetic markers in people who have Williams-Beuren syndrome (WBS), a genetic disorder that makes

? people? friendly and trusting, researchers found the same marker in dogs showing that they had variations in the same kinds of genes that wolves did not possess.

Researchers noted that dogs continue to display hypersociability into adulthood and set them apart from wolves, even wolves who have been hand-raised by people. The study described hypersociability as “a multifaceted phenotype that includes extended proximity seeking and gaze, heightened oxytocin levels, and inhibition of independent problem-solving behavior in the presence of humans.”

Overall, dogs spent a greater amount of time gazing at humans and sought proximity to people more than wolves did. By developing an idea of the sociability of the dogs and wolves, researchers could then determine whether the genetic findings had any relation to their behavior.

As a result, the study proposes that one aspect of domestication is that individuals with hypersocial tendencies were favored under selective breeding leading to adult dogs that show exaggerated motivation to seek social contact unlike adult wolves.

David A. Gordon, DVM
Oceanside Veterinary Hospital
Advanced Care Veterinary Hospital


A cat who looks particularly grumpy or sweet doesn’t seem to be more likely to get adopted. But a cat who rubs up against toys or furniture is more likely to get a home.

Researchers wanted to see whether cat facial expressions had been subjected to selection during domestication. The study was published in the April 2017 issue of Applied Animal Behaviour Science. A study published looked at whether the facial expressions of dogs had an influence over people and discovered that dogs who raised their brows more frequently were adopted more quickly than other dogs. The researchers concluded this was because the act made dogs look more like puppies and theorized the early domestication of dogs could have been influenced by facial expressions.

After categorizing facial expressions, researcher concluded that cat facial movements were not related to the speed with which they were adopted, but their behaviors did have an effected. Cats who frequently rubbed their bodies on toys and furniture were adopted 30% more quickly than cats who didn’t.

The researchers concluded that the study’s finding suggest people are more influenced by prosocial behaviors than facial expressions. This could mean that domestication of cats was not related to facial expressions like the domestication of dogs probably was.


While ancient Egyptians might not have been the first to domesticate cats, they could be the reason behind the spread of cats across Europe and Asia.

Ancient Egyptian culture and artwork has shown us time and again how popular and revered cats were in their society. For that reason, it was believed for many years that they must have been the first to domesticate cats. However, in 2004, researchers discovered a 9,500-year-old cat buried with human remains on the island of Cyprus.

This new study shows that while Egyptians were not the first to domesticate cats, they likely lent to the popularity of the domestic cat.

The researchers performed ancient DNA analysis from bone, teeth, skin, and hair samples of 352 ancient cats. The cat remains tested covered Europe, north and east Africa, and southwest Asia. Samples spanned about 9,000 years, going back to before 6,500 BCE all the way up to the twentieth century CE.

The expansion of cats with this lineage is clear when looking at the progression from 400 CE to 1200 CE. The way Egyptians bred cats and developed the human-animal bond could account for this popularity.

Early depictions of cats in ancient Egyptian art often show them in a working setting—hunting rats, for example. But as time went on, those depictions changed to show domesticated cats living near and among people, like the famous depiction of a cat sitting under a woman’s chair from around 1500 BCE.

One other interesting aspect of the study looked at cats’ coat colors to see if human breeding played a hand in how cats looked as they have with dogs. They found that the blotched-tabby pattern does not appear in cats before the Medieval period. This suggests that ancient Egyptians bred cats for personality traits rather than looks.

And, without ancient trade routes and an Egyptian affinity for cats, maybe the domesticated breeds we know today wouldn’t be as widespread as they are.


Not everyone who hears a dog growling assumes they are being threatened.

Researchers at Eötvös Loránd University in Hungary tested whether people can identify the context of a dog’s growl. They used three different natural situations: dogs at play, dogs guarding food, and dogs faced with a stranger. Participants were able to identify the contexts for the growling at levels higher than chance, although they had a more difficult time distinguishing growls for guarding food and threatening a stranger.

Previous studies have suggested people have more difficulty differentiating between playful and threatening growls. The researchers hypothesized that the length of the growls in those studies, which were restricted to 1.2 seconds, caused confusion as that is shorter than an average aggressive growl and longer than an average playful growl.As a result, this study aimed to give the context of natural growling situations without modifying the frequency or time of the growls.

There were 40 participants, 14 men and 26 women. For the first set of growls, they received a scoring sheet for emotional scaling, choosing from five inner states: aggression, fear, despair, happiness, and playfulness. Rather than just choosing the emotion, however, they had a visual analogue scale and placed the mark along a line, allowing them to rate how strongly the growl associated with a particular emotion.

While the participants’ demographics had no effect on how they scored the growls emotionally, women and dog owners were more likely to correctly recognize the context of growls. Because these results differ from previous studies, the researchers concluded that the length and rhythm of the growls likely helped the listeners to correctly identify growls.

Exposure to household pets from birth could reduce a child’s risk for allergies and obesity.

A study conducted by researchers from the University of Alberta looked at infant gut microbiota to see whether pre- or postnatal pet exposure would have a significant effect.

Mothers were given questionnaires and the infants were split into four categories based on exposure: no pet exposure in the pre- or postnatal periods; only prenatal pet exposure; both pre- and postnatal pet exposure; and only postnatal pet exposure.

More than half the infants had some exposure to pets—8% were exposed in pregnancy alone and 46.8% had exposure during both time periods.

To control for other factors, comparisons were conducted for specific groups with or without siblings, non-exclusively breastfed infants, as well as non-exclusively breastfed infants without siblings.

Pre- and postnatal pet exposure enriched the abundance of the bacteria of Oscillospira and/or Ruminococcus. It was determined that infants with high levels of Oscillospira and Ruminococcus would be at a lower risk for allergies and obesity.

Some of the benefits of pet exposure applied to infants who had prenatal exposure but not postnatal exposure, indicating that the microbiome exchange could take place before birth. The researchers concluded that further research is needed to link the microbiota changes with the health outcomes of infants in this study as well as children in other cohorts.

Stressed owners lead to stressed dogs.

Owners might be able to influence their dogs’ ability to adapt to stressful situations.

Researchers from the University of Vienna conducted a study to see how owners and dogs might influence each other in adaptation to stressful situations. They wanted to see whether human and dog personalities might make the other more or less able to handle stress. In order to test this, researchers took samples of dog and human saliva after various testing situations and measured the levels of the stress hormone cortisol. The researchers also used questionnaires to analyze the personalities of owners and their dogs.

Extended exposure to stress and anxiety can affect a person’s cortisol levels. If exposed to continued stress over time, the levels won’t vary much, even in reaction to extra stressful situations, indicating a more constant state of anxiety. For this reason, the researchers hypothesized that dogs and people with high cortisol variability were better able to adapt to stressful situations. They believe testing these levels of cortisol “may be an informative measure of stress coping, with a high amplitude between arousal peaks and relaxation lows reflecting healthy regulation.”

The study focused on 132 human-dog pairings. Owners completed questionnaires to assess their personality and their dog’s personality. Questionnaires evaluated the owner’s personality in five categories: Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness. They also considered the attachment between the owner and the dog.

Results showed that female owners with male dogs had the lowest cortisol variability of all owner gender-dog sex combinations. Owners who scored high in Agreeableness had higher cortisol variability as did owners with dogs who were cool and friendly.

Owners who scored high in Neuroticism had dogs with low cortisol variability. Neuroticism, according to the researchers, is linked to low expectations of social support, major depression and anxiety. As a result, dogs who are sensitive to their owners’ emotional state “may mirror the anxiety and negative expectations of neuroticistic owners in their cortisol variability.” Dogs who were insecure in attachments to owners also had low cortisol variability.


Using the high-pitched “dog voice” toward pets works better for puppies than adult dogs.

Researchers decided to look into this pet-directed speech, which is similar to the tone of voice used for human babies “known to engage infants’ attention and promote language learning.” In the first investigation of “potential factors modulating the use of dog-directed speech,” the research also aimed to determine its immediate impact on behavior.

To find out how dogs reacted to human speech, researchers had 30 female volunteers read a script while looking at pictures of dogs—both puppies and adults. The script included common phrases like, “Who’s a good boy?” They also recorded as if speaking to another person.

Analysis of these recordings found that the human speakers used dog-directed speech no matter the age of the dog in the photo, but that when speaking to puppies, the pitch of their voice did go up.

The recordings were then played for 10 puppies and 10 adult dogs. 9 out of the 10 puppies reacted strongly, barking and running toward the loudspeaker even when the recording had been made for an older dog. The adult dogs, meanwhile, did not react to speech directed at puppies, older dogs, or humans.

Adult dogs seemed to ignore dog-directed speech at least when the voice is from an unfamiliar person.

To find out whether speaking to puppies this way could help them learn words, like speech directed at infants does, more studies will have to be done.


In research conducted by Leeds Beckett University, researchers interviewed dog walkers about their relationships with their dogs on their walks. The aim was to examine how humans share space with their pets and how they negotiate the walking experience.

Lead researcher Thomas Fletcher explained in press release, “The study reveals that humans walk their dogs in large part because they feel a deep-rooted emotional bond with them and hold a strong sense of obligation to ensure they stay fit and healthy. Perhaps more interestingly, humans also walk their dogs because they believe their dogs have fun and are able to be more 'dog-like' while out on a walk.”

The study found that people thought of the walk as something they did for their dog and that characteristics of the walk, including timing, length, and place were determined by the dog’s personality and what the people thought the dogs liked and disliked the most.

Many walkers indicated, for example, that they would avoid high-trafficked areas if they thought being around other people and dogs would be stressful for the dog on their walk.

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