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Do Animals Smile?Category: (general)
Tuesday, 4 October 2011
09:11:57 PM (GMT)
Pavlov might have called that happy look on your dog’s face a collection of
conditioned reflexes, but now science is catching up with what animal lovers have
always known.

According to Professor Nicholas Dodman, head of animal behavior at the Cummings
School of Veterinary Medicine at Tufts School of Medicine and a regular on Animal
Planet’s Dogs 101 and Cats 101, until recently, scientists have generally
underestimated the emotional range of animals. He says that today it is widely
understood by scientists that mammals do experience primary emotions such as fear,
sadness, anger, and happiness and even some secondary emotions like jealously and
embarrassment—and they communicate them. Dodman says that dogs even have a sense of
humor and laugh with a kind of huffing sound. He describes a study that examines how
playing recordings of this laughing sound actually calms shelter dogs.

As for dogs’ smiles, he points out the dogs in our slideshow, “Note that the lips
horizontally retract into what’s called a ‘submissive smile’ – a sign that a
dog is non-threatening. It’s an expression that disarms possible aggression, much
like the human smile.” Chimps, such as the group in our slideshow, exhibit what’s
called a “play face” – or an invitation for fun.  Cats have naturally bowed
mouths—like the cat in our slideshow, so Dodman says its tricky to pinpoint an
actual smile, but they are emotionally sensitive, trainable, and affectionate. Among
many other pets, Dodman has enjoyed sharing his home with rats, which he says are
“very affectionate and intelligent.” Dodman, points out that your pet might not
understand the exact details of your hard day, but you probably sense it is
empathetic enough to curl up and listen. 

Marc Bekoff, Professor Emeritus of Ecology and Evolutionary Biology at the University
of Colorado and author of The Animal Manifesto: Six Reasons for Increasing our
Compassion Footprint, agrees. “People are often keener observers of animal behavior
than they give themselves credit for,” says the leading expert on animal emotions.
Bekoff says that scientific research, for the most part, eventually confirms what
animal lovers intuit and observe. Part of the lag is due to “studying animals in a
box” as Dodman calls it. Dodman, who is giving a series of lectures on dog and cat
behavior in November, explains that our advances in understanding the richness and
depth of animal’s lives is enhanced by researchers such as Jane Goodall who live
with animals in their natural environments.

Bekoff points out that it makes biological and evolutionary sense for animals to
experience a range of emotions and be able to show them, just as it does for humans.
In a paper published by researchers from the University of Washington on rats,
laughter, and joy, the authors describe how young rats vocalize when being tickled.
The scientists explain that this laughter is bonding and “may have evolutionary
relations to the joyfulness of human childhood laughter commonly accompanying social
play.” Bekoff says our emotions might not be exactly analogous to those of animals,
but neither are all humans’ emotions the same.  “The way two siblings experience
the death of a parent might not be exactly the same, but they are both experiencing

Bekoff believes that our growing acceptance of animals as sentient beings based on
scientific research needs to lead to legislation that provides significantly more
protection of animals in labs, slaughterhouses, and entertainment. For example, a
2011 study on chimpanzees and mood disorders concluded that, “Chimpanzees display
behavioral clusters similar to PTSD and depression [to humans] in their key
diagnostic criteria, underscoring the importance of ethical considerations regarding
the use of chimpanzees in experimentation and other captive settings.” As for how
this understanding affects humans, it has also, as he puts it, “increased humans’
knowledge of our place in the world as mammals—unique mammals—but mammals,

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