It’s no big surprise — given it’s what led them to befriend us in the first place — that dogs have been dining on our scraps since early in their domestication.
What’s more interesting is how dogs adapted to our junk food ways.
A team of researchers from France, Sweden and Romania has found evidence indicating that domesticated dogs underwent a genetic transformation, developing multiple copies of a gene that aids in the digestion of starch.
That’s the same thing we humans did, when we made the transition from a hunting to a farming society, consuming more starches and vegetable and less meat.
In their paper published in the journal Royal Society Open Science, the team describes what they found out by conducting a DNA analysis of ancient dog teeth and other bones.
They conclude that, around 7000 years ago, domesticated dogs were eating so much wheat and millet they made extra copies of starch-digesting genes to help them cope.
That we and dogs can have our genes altered by the food we consume and the repeated behaviors we engage in, is kind of intriguing, and kind of scary — and it brings new credence to the old phrase “you are what you eat.”
Some of the first insights into how farming changed the canine genome came three years ago, according to Sciencemag.com
That’s when a team led by evolutionary geneticist Erik Axelsson of Uppsala University in Sweden discovered that dogs have four to 30 copies of a gene called Amy2B, whereas wolves typically only have two.
The new study sought to get a better handle on when that happened.
Axelsson teamed up with Morgane Ollivier, a paleogeneticist at Ecole Normale Supéieure de Lyon in France and others, who extracted ancient DNA from the bones and teeth of 13 wolf and dog specimens collected from archaeological sites throughout Eurasia.
Four of the ancient dogs — from a 7000-year-old site in Romania and 5000-year-old sites in Turkey and France — had more than eight copies of Amy2B, Ollivier and his colleagues reported in Royal Society Open Science.
The findings rule out a modern origin for the increase in the number of Amy2B genes in dogs.
As humans turned to farming, the number of copies of Amy2B increased — first in us, then in dogs.
Being able to survive on whatever humans discarded likely enabled dogs to become widespread as people migrated across the globe, the scientists say.
It’s food for thought — how what we eat, or other repeated practices, can lead, far down the road, to alterations in our DNA.
Might scientists discover, generations from now, for example, that we humans have developed a selfie-taking gene that won’t let us stop taking excessive photos of ourselves?
They’ll name it 02BME.
Posted by John Woestendiek November 15th, 2016 under Muttsblog.
Tags: amy2B, animals, digesting, digestion, dog, dogs, domestication, evolution, farming, gene, genes, genetics, humans, hunting, man, pets, research, science, species, starch, study
Archaeologists say they have uncovered evidence that dogs weren’t just already domesticated by man 7,000 years ago, but they were taking road trips with him as well.
They say a dog’s tooth found one mile from Stonehenge is the earliest evidence of people traveling to the site of the prehistoric monument — even before its famous rock formation was constructed, believed to be 5,000 years ago.
An isotope analysis of the tooth’s enamel at Durham University showed the dog originally hailed from York, or at least had consumed water there. Bones found near the site suggest the dog feasted on salmon, trout, pike, wild pig and red deer.
Researchers believe the dog made the 250-mile trip from York to Wiltshire 7,000 years ago with a Mesolithic hunter-gatherer.
Possibly, they say, he was taking it there to trade.
Archaeologist David Jacques, who leads the team digging at an encampment site called Blick Mead, said the findings show that dogs were domesticated by Mesolithic times, and that, contrary to popular thought, man was doing some long distance travel back then.
And it shows that what’s now the world’s most famous prehistoric monument was drawing people from afar even before whoever arranged those rocks arranged those rocks.
“The fact that a dog and a group of people were coming to the area from such a long distance away further underlines just how important the place was four millennia before the circle was built,” said Jacques, a senior research fellow at the University of Buckingham.
As the decade-long dig continues, The Guardian reported, evidence is accumulating that Stonehenge — as long as 7,000 years ago — was a gathering place.
“It makes us wonder if this place is a hub point, a really important place for the spread of ideas, new technologies and probably genes,” Jacques said.
Our guess? It was a flea market.
Posted by John Woestendiek October 7th, 2016 under Muttsblog.
Tags: animals, archaeologists, archaeology, blick mead, dig, discovered, discovery, dog, domesticated, domestication, found, heritage, isotope analysis, mesolithic, monument, pets, prehistoric, research, road trip, stonehenge, study, teeth, tooth, travel, wilshire
Some researchers are suggesting that selfish mama dogs may have played a role in the early domestication of the species by keeping the good food to themselves, as opposed to sharing it with their pups.
As a result, the researchers theorize, pups and young dogs ventured out of the wild and into human communities where they didn’t have to compete as hard for food — at least not with their own mothers.
(Being a cartoonist at heart — albeit one who can’t draw — I am picturing a young pup, sneaking away from the home of his domineering mother with one of those sacks on a stick over his shoulder, muttering to himself, “That bitch. That bitch. That greedy bitch!”)
Sure, there may be some substance to this research, but it mostly makes me laugh.
The researchers conducted experiments with feral dogs in India, then theorized that ancestral dogs thousands of years ago must have behaved the same way.
First, they offered low-quality biscuits to mother dogs, and the mother dogs tended to share those with their pups, with no conflicts arising.
Then they brought out the good stuff. Protein-rich meat seemed to make the mother dogs forget their motherly ways, growling at their pups to keep them away, and even grabbing meat from the mouths of their puppies.
The authors, Anindita Bhadra and Manabi Paul of the Indian Institute of Science Education and Research, say ancestral dogs, once they reached 8 or 9 weeks old, became able to clearly distinguish between protein rich food sources and the un-nourishing filler their mothers were trying to pass off on them.
At that point, the researchers theorize, many young ancestral dogs would set out for farming communities where they had access to what humans threw away. There is evidence also that the earliest farmers fed these dogs, making life among humans even more appealing.
The theory, outlined in the journal Royal Society Open Science, could help to explain the origins of dog domestication and how some ancestral dogs so willingly elected to live with people instead of with their own kind, Discovery reports.
“Ancestral dogs” is kind of a safe term scientists use — just in case dogs didn’t evolve from wolves, but from some other species.
As for why ancestral dog moms turned so selfish when a good cut of meat became available, Bhadra said, “We feel that the mothers just tend to grab the best resources when available.”
Ancestral mother dogs are not available to respond to those charges, so I will speak for them:
“Hey, you think it’s easy giving birth to 14 kids at once, and then raising them? Alone?
“Yeah, where IS dad? Good question. Haven’t seen him since he knocked me up.
“So, yes, I get a little anxious, a little snippy. But I’ve got to feed the whole lot of them, and protect them. It’s not like I can walk into the Food Lion and get all I need. You have no idea how tired I am. And yes, I get hungry, too. If I am not nourished, how do you expect me to nourish all of them? Go research that, why don’t you?”
(Photo: From Lovethesepics.com)
Posted by John Woestendiek December 9th, 2015 under Muttsblog.
Tags: ancestral dogs, animals, dog, dogs, domesticated, domestication, feeding, food, greedy, humans, mothers, pets, puppies, pups, research, science, selfish, study, wolf, wolves
An Oregon State University scientist’s study, published yesterday, is drawing a lot of attention for concluding (as scientific studies often do) the obvious:
The longer dogs live with us, the more dependent they become on us, and, as a result, their problem solving and survival skills aren’t what they were back when they were wolves.
Not to sound stupid, but duh.
This, friends, is evolution. Just as our ancestors could once shred apart a mastodon leg without using an electric carving knife, the ancestors of dogs — i.e. wolves — did, and do, what they have to do to survive.
But to say dogs are “dumbing down” as a result of the cushy life we are affording them, well that’s just a little narrow-minded.
I prefer to think of it as their skills taking a new direction.
Do we say children are becoming more “stupid” because they can’t use a manual typewriter or blacksmith tools?
Of course the scientist and author of this study didn’t use the word “stupid” — only headline writers do that.
More “dim” is how the Smithsonian put it. “Stupid” and “lazy thinkers” is what the Daily Mail called them. “Poor problem solvers” was the phrase of choice for Discover magazine. “Rubbish at solving problems,” reported the International Business Times.
Kinda makes you think the dog world could use a public relations pro at least as adept as the one who garnered the author of this study so much press.
Up to now, canine cognition studies have mostly marveled at how dogs have learned to interact with humans — and cited that as proof of how incredibly smart they are.
This new study, and some earlier ones, however, are portraying how much dogs are relying on humans as an example of how we are “dumbing them down.”
Yes, dogs are growing ever more dependent on humans. Just as humans are growing ever more dependent on computers. Who does that make stupider? Or is “more stupid” the righter way of saying that?
The study at issue is by Monique A.R. Udell, an assistant professor of animal and rangeland sciences at Oregon State University. In it, she compared the problem solving skills of dogs and wolves.
Ten pet dogs and ten wolves were presented with a solvable puzzle. Sausage was placed inside a sealed plastic tub with a hard to open lid. Just one of the dogs was able to open the tub, while eight of the wolves were.
Dogs often gave up more quickly, and turned to their human masters for guidance, often with that cute head tilt they use to manipulate us. (It’s only fair after the thousands of years we’ve been manipulating them, starting with their domestication.)
The wolves, meanwhile, sought out no such help, and spent more time trying to get in the box. It should be noted they also spent more time trying to get into an impossible to open box.
How smart is that?
Udell believes depending on humans for help is not necessarily a cognitive asset. She calls the response a “conditioned inhibition of problem-solving behavior.”
Udell’s findings were published yesterday in the journal Biology Letters.
So, no, I don’t buy that a wolf being able to open a box, or spending more time on the task, is proof they are any smarter. They use their paws and claws and teeth, and perhaps some brute force — but they don’t take a second to consider other alternatives.
Dogs on the other hand, have an entire arsenal — from head tilt to sympathy-invoking whimper, from batting their big eyes at us to licking our hands as if to say, “If you love me, you will help me with this.” To me, that’s proof dogs are smarter.
After all, which is more easy to manipulate, a can of Spam or a human being?
(Cartoon by Charles Barsotti / The New Yorker)
Posted by John Woestendiek September 17th, 2015 under Muttsblog.
Tags: animals, behavior, box, canines, cognitive, dogs, domesticated, domestication, experiment, manipulate, manipulation, oregon state university, pets, problem solving, sausage, science, scientist, skills, study, wolves
A new study has a bone to pick with earlier researchers who concluded the domesticated dog has been around for 30,000 years.
New 3D analysis of skulls that had been identified as two of the earliest dogs shows they were actually wolves, a research team writes in the Nature journal Scientific Reports.
Fossilized remains that scientists said showed dogs date back at least 31,680 years — specifically those remains unearthed at Goyet Cave in Belgium — actually belonged to a wolf, according to a new study. So too, the new study says, did a 13,905-year-old fossil that was identified as belonging to a dog after it was found at a site called Eliseevichi in Russia.
The new study concludes that the the domestication of dogs happened during the Neolithic era (10,200 B.C.-2,000 B.C.) as opposed to the Paleolithic era (2.6 million years ago to 10,200 B.C.)
“Scientists have been eager to put a collar on the earliest domesticated dog,” lead author Abby Grace Drake said. “Unfortunately, their analyses weren’t sensitive enough to accurately determine the identity of these fossils.”
“Previous research has claimed that dogs emerged in the Paleolithic but this claim is based on inaccurate analyses,” Drake told Discovery News. “We reanalyzed some of the fossil canids from the Paleolithic and show that they are, in fact, wolves.”
“We did confirm that the Neolithic specimens Shamanka II (around 7,372 years old) and Ust’-Belaia (about 6,817 years old) are dogs, and therefore domestication took place by this time period or earlier,” added Drake, an assistant professor of biology at Skidmore College.
That means the wolves — who are generally (but not unanimously) believed to have evolved into dogs, possibly as a result of their interacting with humans — first appeared on earth after humans were farming and living in settlements, as opposed to when they were living in caves and hunting and gathering.
Drake and colleagues Michael Coquerelle and Guillaume Colombeau used scans and 3D visualization software to study the shape and size of the two oldest skulls and compare the data with measurements from the skulls of other dogs and wolves, according to a report on Phys.org.
That technique allowed the team to identify subtle morphological differences between dogs and wolves, such as the direction of the eye cavity and the angle between the muzzle and forehead.
(Photo: Abby Grace Drake, Skidmore College)
Posted by John Woestendiek February 6th, 2015 under Muttsblog.
Tags: analysis, animals, dog, dogs, domestication, evolution, fossilized, fossils, neolithic, origin, paleolithic, pets, remains, research, science, skidmore college, wolf, wolves
The reason dogs are still around — and probably will still be when we’re not — is their uncanny ability to adapt.
Since wolves were first domesticated, becoming dogs, they’ve been on a continuous learning curve, learning how to live alongside man, and taking advantage of everything from his good nature to his furniture to his kitchen appliances.
Perhaps no breed is more adept at working these angles than beagles. They are master escape artists, wily hunters and accomplished problem solvers whose cuteness and charm trumps those occasions when they are — dare we say it — pains in the ass.
This one found a way to get chicken nuggets out of a toaster oven on the kitchen counter.
And his owner caught her in the act.
After Lucy came under suspicion for the disappearance of a roast that had been cooking in the oven, her owner set up a hidden camera. It caught Lucy as she nudged a chair next to the counter, jumped up on said counter, opened the toaster oven, removed some chicken nuggets, and enjoyed a snack.
“A few weeks before she took a roast out of the oven that had been cooking for a few hours … So I set her up. I put some nuggets in the oven… Pressed record and left,” her owner, Rodd Scheinerman, said on his YouTube post. “This was 7 minutes into the video.”
We present this as proof positive that dogs just keep getting more clever while we humans … well, I’ll refrain from badmouthing an entire species.
But given Lucy’s kitchen skills, and the possibility she could be injured, we think her owner might want to consider limiting her access to the room when he’s not there and the oven is on, maybe with a dog-proof barricade.
A very dog-proof barricade.
Posted by John Woestendiek January 17th, 2014 under Muttsblog, videos.
Tags: adapt, adaptability, animals, appliances, beagle, beagles, behavior, camera, caught in the act, chicken, clever, dog, dogs, domesticated, domestication, evolution, food, furniture, hidden camera, humans, kitchen, nuggets, oven, pets, toaster oven, video
Remember Denver, the guilty, oh-so-guilty, looking yellow lab that was captured on video by her owner while she was being interrogated in the case of the missing cat treats?
We suggested — partly in jest — that she might be innocent, that appearances can be deceiving, not to mention misinterpreted, and that, just maybe, the cat did it.
Now — with the video having gone viral, with dog and owner having appeared on the ABC’s Good Morning America, with a line of “guilty dog” merchandise having been spawned — there’s more reason to believe that Denver might have been wrongly convicted. How guilty one looks and how guilty one is are two different things — especially when it comes to dogs.
Guilt, research shows, may be just another human emotion that dog owners anthropomorphically ascribe to dogs.
And all those behaviors Denver exhibited — avoiding eye contact, lying down, rolling into a submissive position, dropping the tail, holding down the ears or head, raising a paw — are more likely triggered by the owner’s semi-scolding tones than any feelings of “remorse.”
This reminder/revelation comes from someone who knows, who did her master’s dissertation on this very topic, and who produces one of my new favorite blogs, Dog Spies.
Julie Hecht is a New York-based behavioral researcher who has worked with Patricia McConnell and Alexandra Horowitz. She wrote her dissertation at the University of Edinburg on “Anthropomorphism and ‘guilty’ behavior in the dog,” and did her research with the Family Dog Project in Budapest, Hungary. She recently started Dog Spies, which focuses on the science behind dog behaviors and the dog-human relationship, and she divides her time between research, lecturing, blogging and working with individual pet owners.
As was my goal (plug alert) in my recently published book, “DOG, INC: The Uncanny Inside Story of Cloning Man’s Best Friend,” she attempts to take the boring out of science, thereby making it interesting and understandable. “Scientific journals should be titled, ‘Lots of great information within, a tad boring to read!’ Dog Spies translates that information and shares it with you,” reads the introduction to her blog.
Judging from her “guilty dog” blog entry — and you know its trustworthy, because it has footnotes — Denver’s appearance, with her owners, on the ABC morning show raised her hackles a bit.
“According to the dictionary, ‘news’ is ‘information about recent events or happenings.’ I did not see any news during that morning show. Instead, I saw a bunch of morning personalities throwing out assumptions and offering the audience pleasing banter and humorous judgments about dogs. They provide no real information or ‘news’ about what happened to the cat treats.”
Here Hecht has hit on one of my pet peeves — pun definitely not intended. Rather than shedding some light, doing some research, and furthering our understanding of canines, the ABC segment — like so much of what the media, blogs included, feed us about dogs — was the kind of cutesy, substance-free fluff that reinforces misinformation and misunderstanding.
Like most everyone else, the smiling morning show hosts concluded Denver must have eaten the cat treats. When shown the empty bag and asked, “Did you do this?” Denver displays squinting eyes, averts her head and makes a highly laughable presentation of her teeth.
Guilty. Guilty. Guilty.
Or maybe not.
Hecht cites a 2008 research paper that says 74 percent of dog owners attribute guilt to dogs, and believe dogs know when they have done something owners disapprove of. But scientific research shows that it’s not knowledge of a misdeed, or remorse, that leads to the guilty look, but an owner’s scolding. (See the New York Times piece, “It’s an Owner’s Scolding That Makes a ‘Guilty’ Dog.”)
Or, see this — a video Hecht made that shows a dog named Gidget being falsely accused:
As Alexandra Horowitz, author of “Inside of a Dog,” once put it: “We’ve trained them that when they see us angry, they give us that guilty look. I’m not saying they don’t feel guilt … I can’t test that yet. But we generate the context that prompts them to produce this look.
Why then, in the guilty dog video gone viral, does Denver show these behaviors when the other, presumed innocent family dog, Masey, does not?
“Research finds that even post-transgression, not all dogs show the ‘guilty look’ in the presence of a non-scolding owner,” Hecht says. And, transgressions aside, it might be the simple fact that Denver is a more expressively submissive dog, according to Hecht, who says part two of her entry on the “guilty dog look” will be appearing soon on her blog.
Why do dogs show what appears to be a guilty look more so than do their progenitors, wolves?
“Dogs have, for the most part, incredibly malleable and expressive faces (much more so than, say, cats) and from this, we can often see the subtleties of their eyebrows going down or up or their wide forward-facing eyes, becoming wider. All of these things could impact how humans attribute mental states to dogs,” Hecht told me.
My theory is there’s more at play — though maybe I’m giving dogs more intellectual credit than they deserve. I think mastering the guilty look is another way dogs have evolved since their domestication, and to cope with their domestication — part of their ongoing adaption to pethood. By showing submission, some of them may have have figured out, they can keep the peace, and maybe even get a belly rub or a Milkbone.
To me, the even more interesting question, when it comes to “the guilty look,” is whether, even before the scolding comes, dogs can sense it’s about to. Before a word comes out of the owner’s mouth, before an angry stance is even taken, can dogs sense that some displeasure is churning within us?
I, without any research or footnotes to back me, believe so. My scientific explanation for this: It’s magic.
Dogs are figuring us out. Which, until recent years, is maybe more than they could say about us. We’ve always been more concerned with their brawn than their brain, more concerned with their beauty than their behavior. It’s man’s hand that has led to the vast diversity of shapes and sizes in dogs. And while breeders have begun to put a higher priority on temperament, it can still be argued that appearance is placed above all else.
Could it be, in their way — without the aid of microscopes, opposable thumbs or access to our pedigrees — dogs are looking more deeply into us than we are into them? Could it be, during their time in domestication, dogs, as a species, have amassed a wealth of knowledge on how to best get along with humans, and have become even better at doing so than humans?
I think there’s more at work than breeding and genetics and instinct when it comes to dog behavior. An ongoing and not fully understood evolution is at play in the dog-human relationship. And that is the reason — all those unanswered questions about behavior, coupled with those we wrongly assume we know the answers to — why dog blogs of substance, like Hecht’s, are important.
At the same time, though, I rue the day when our understanding of dog behavior is complete — when we can explain every act of dog as stemming from some lingering instinct, or adaptation to their domestication. For then the magic will be gone.
I want all three — my science, my magic and my dog. Does that make me greedy?
Posted by John Woestendiek April 27th, 2011 under Muttsblog.
Tags: abc, adaptation, alexandra horowitz, animals, anthropomorphism, appearances, behavior, cat treats, cognition, coverage, denver, dog, dog inc., dog spies, dog-human, dogs, dogs guilty look, domestication, emotions, feelings, good morning america, guilt, guilty, guilty look, humans, inside of a dog, instinct, julie hecht, looks, media, morning show, news, patricia mcconnell, pets, relationship, remorse, scolding, submission, submissive, video, viral