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
Before you wipe off that next dog kiss — not that too many ohmidog! readers are the sort that do that — you might want to think about this:
Some of those doggy bacteria that dog-disliking alarmists and hand-wringing medical types are always warning us about might actually be good for you.
As with Greek yogurt and kimchee, some of the microbes lurking in a dog’s gut could have a probiotic effect on the owners’ body, aiding in both digestion and overall health.
Researchers at the University of Arizona are now seeking volunteers to take part in a study to prove just that — and here’s the coolest part: Volunteers, if they want, can keep the shelter dog assigned to them when the study is done.
The “Dogs as Probiotics” study will focus specifically on the effect dogs have on the health of older people — in terms of physical well-being, mental well-being and cognitive functioning.
“We already know that dogs make us happier and in some ways healthier. The main point of this study is to try and understand whether or not there is an actual biological component behind this,” Kim Kelly, a UA doctoral student in medical anthropology, and one of the study’s primary investigators,
told the Arizona Daily Star.
“This has the potential to change the field in terms of how we understand, think about and use microbes to improve our health,” she said.
The study team is recruiting adults over the age of 50 and asking them to live with a dog from the Humane Society of Southern Arizona for three months.
Both the human and canine subjects will undergo tests of an non-invasive sort during the study to determine whether or not the positive microbes in the humans increase, and whether it correlates with improved immune measures in older adults.
Probiotics are often referred as “good” or “helpful” bacteria. They can help keep the intestines healthy, assist in digesting food, and are believed to help the immune system.
Kelly, along with researchers at the University of San Diego and the University of Colorado, will explore whether living with a dog encourages the growth of positive micro organisms in the human gut.
“We essentially want to find out, is a dog acting like yogurt in having a probiotic effect,” she said.
In addition, researchers will monitor participants for any changes in the mental health and emotional well-being.
Once the scientists are done, human participants will have the option of keeping the dog they kept in their home during the study.
We’re guessing that — whether their digestion has improved or not — most of them will.
Who wouldn’t want someone who has been kissing them for three months to hang around?
(Video: Attendees at the SPCA of Maryland’s March for the Animals, 2009, receiving some free probiotics from my dog Ace; photo: Kim Kelly and her cocker spaniel Katie, courtesy of Kim Kelly)
Posted by John Woestendiek March 24th, 2015 under Muttsblog, videos.
Tags: ace, animals, bacteria, benefits, cognition, digestion, digestive, dog, dogs, dogs as probiotics, germs, good bacteria, health, health benefits, humane society of southern arizona, kim kelly, kisses, kissing, licking, licks, mental health, microbes, pets, probiotics, study, university of arizona, volunteers
It’s not too often we cover cats at ohmidog!, but National Hairball Awareness Day (it’s today, if you didn’t know) isn’t strictly about cats.
Dogs get hairballs too — as do humans, and cud-chewing animals, such as cows, oxen, sheep, goats, llamas, deer, and antelope.
As pets go, though, cats are more prone, and with almost 90 million U.S. cat owners we feel it’s our duty to pass on these hairball-alleviating tips — not just to avoid having to clean them up, but because they can pose dangers to the animal by blocking food from passing through the intestines.
The folks who make the FURminator offer the following tips, chief among them of course, buying their products:
– The more you groom your cat, the less, he or she will groom his or herself, making hairballs less likely. In addition to deshedding tools, there are shampoos that claim to reduce shedding.
– A little butter or pumpkin added to food can decrease the likelihood of hairballs, the butter helping grease the way, the pumpkin’s fiber helping to get things moving.
– Keep your cat well hydrated, placing water bowls throughought the house.
– Laxative supplements from your vet can help with chronic hairball problems.
If you want to learn even more about hairballs (and we would hope you don’t), the National Museum of Health and Medicine has a webpage devoted to them, and, should you want to make the trip to Washington (and we really, really hope you don’t) there’s a human hairball on permanent display in the museum.
The National Museum of Health and Medicine has 24 veterinary and 3 human hairballs or “trichobezoars” in its anatomical collection. To commemorate National Hairball Awareness Day on April 27, 2006, the museum featured a temporary display of 10 of these hairballs to explore the myths and realities behind these medical curiosities. Included were hairballs from a steer, two oxen, three cows, a calf, horse, and a chicken.
As for our picture above, rather than be so tasteless as to confront you with the real thing, we’ve chosen a crocheted hairball from the collection of Fluffy Flowers. If you’d like to learn how to make your own (and, once again, we’re hoping you don’t), you can find a tutorial here.
Posted by John Woestendiek April 24th, 2009 under Muttsblog.
Tags: advice, animals, cats, chicken, cows, digestion, dogs, fur, furminator, hair, hairballs, health, horse, humans, ill, national hairball awareness day, pets, precautions, shedding, sickness, steer