Most wild dingos are pure, not hybrids

In a University of New South Wales study led by Dr. Kylie Cairns, a conservation biologist, they discovered that most of the dingo population is pure and not crossed with dogs as previously thought. This is important because dingo’s and dingo crosses were considered “wild dogs” an invasive species, and were allowed to be hunted.

What is interesting is that Dingoes are genetically distinct from domestic dogs but they can interbreed.

Dingo – Google free image

According to Dr. Cairns, the old method of determining the purity of dingoes only used a small number of genetic markers (only 23) which overestimated the amount of dog ancestry, being inaccurate by over 30 percent. The new test allows them to look at 195,000 points across the genome.

Dr. Cairns feels that the dingo should be protected and not subjected to lethal control measures. If the dingo is removed the area can become overrun by kangaroos, foxes and feral cats which threaten other native animals and alter the vegetation. While dingoes are a threat to some livestock, they do play a crucial role in maintaining the ecosystem and biodiversity.

Sue’s note: This sounds very similar to past issues that we have had in the United States with wolves. This study also shows that because two species can interbreed, it does not mean that they are descended one from another. Many species that are not related are interbred, such as in the feline, equine and canine families.

  1. Kylie M. Cairns, Mathew S. Crowther, Heidi G. Parker, Elaine A. Ostrander, Mike Letnic. Genome‐wide variant analyses reveal new patterns of admixture and population structure in Australian dingoesMolecular Ecology, 2023; DOI: 10.1111/mec.16998

University of New South Wales. “New DNA testing technology shows majority of wild dingoes are pure, not hybrids.” ScienceDaily. ScienceDaily, 30 May 2023. <www.sciencedaily.com/releases/2023/05/230530125449.htm>.

How old is your dog, really?

The old rule that one dog year equals seven in human years is not true. What the researchers found was that dogs age differently than humans. For example, Trey Ideker of the University of California, San Diego pointed out that a nine-month-old dog can have puppies. If you do the math, it is obvious that the 1 year equals seven does not work out. They studied Labrador Retrievers to see how they age on a molecular level by comparing changes in the methylation pattern. They discovered that dogs age rapidly at first and then slow down later in life.    

According to the article “The comparison revealed a new formula that better matches the canine-human life stages: human age = 16 ln (dog age) + 31. Based on the new function, an 8-week-old dog is approximately the age of a 9-month-old baby, both being in the infant stage where puppies and babies develop teeth. The average 12-year lifespan of Labrador retrievers also corresponds to the worldwide life expectancy of humans, 70 years.”

The researchers noted that they need to do more studies because different breeds age at different rates. Having a more accurate way to measure a dog’s age will help both dog owners and veterinarians better appreciate and care for dogs.

Journal Reference:

  1. Tina Wang, Jianzhu Ma, Andrew N. Hogan, Samson Fong, Katherine Licon, Brian Tsui, Jason F. Kreisberg, Peter D. Adams, Anne-Ruxandra Carvunis, Danika L. Bannasch, Elaine A. Ostrander, Trey Ideker. Quantitative Translation of Dog-to-Human Aging by Conserved Remodeling of the DNA MethylomeCell Systems, 2020; DOI: 10.1016/j.cels.2020.06.006

Cite This Page:

Cell Press. “How old is your dog in human years? New method better than ‘multiply by 7’.” ScienceDaily. ScienceDaily, 2 July 2020. <www.sciencedaily.com/releases/2020/07/200702113649.htm>.

The fountain of youth for animals and people

In an interesting study conducted by researchers at the USC Leonard Davis School of gerontology it was determined that humanin, a peptide encoded in the small genome of mitochondria which is the powerhouse of the cell, is responsible not only for longevity, but for good health.

The study found that children of centenarians had higher levels of humanin then children of non-centenarians. They also found that people with Alzheimer’s disease had lower levels of humanin.

In animals, humanin is found from worms to mammals. The naked mole rate has a very high level and lives up to 30 years. What is also interesting, the researchers found that for both people and animals, those who had higher levels of humanin had fewer offspring.

Researchers are looking into ways to use this information to help people have longer and healthier lives. What I wonder is if they will find a way to increase the lives of animals as well as make them healthier. Imagine being able to help those breeds of dogs that have shorter life spans and medical problems live a longer, healthier life. Both people and animals would benefit.

Journal Reference:

  1. Kelvin Yen, Hemal H. Mehta, Su-Jeong Kim, YanHe Lue, James Hoang, Noel Guerrero, Jenna Port, Qiuli Bi, Gerardo Navarrete, Sebastian Brandhorst, Kaitlyn Noel Lewis, Junxiang Wan, Ronald Swerdloff, Julie A. Mattison, Rochelle Buffenstein, Carrie V. Breton, Christina Wang, Valter Longo, Gil Atzmon, Douglas Wallace, Nir Barzilai, Pinchas Cohen. The mitochondrial derived peptide humanin is a regulator of lifespan and healthspanAging, 2020; DOI: 10.18632/aging.103534

University of Southern California. “Protein in mitochondria appears to regulate health and longevity.” ScienceDaily. ScienceDaily, 24 June 2020. www.sciencedaily.com/releases/2020/06/200624151613.htm

Note that Science Daily has changed their format. To find this article google the name of the article with “science daily” after it.

Do animals have beliefs?

Based on the research by Dr. Tobias Starzak and Professor Albert Newen from the Institute of Philosophy II at Ruhr-Universität Bochum, yes, they do. Although it is not easy to prove, the research shows that chimpanzees, dogs, and some birds have beliefs. It stands to reason that if these animals do, others do as well.

According to the study for an animal to illustrate that they have beliefs, they must meet certain criteria. They must have information about the world; the animal must be able to use the information in a flexible manner; then that information is then internally structured into a belief with different aspects of that information being processed separately; and they must be able to recombine the components of the information in unique ways.

According to Albert Newen, flexible behavior which can be interpreted as caused by beliefs has been observed in chimpanzees, rats and Border collies.

Journal Reference:

  1. Albert Newen, Tobias Starzak. How to ascribe beliefs to animalsMind & Language, 2020; DOI: 10.1111/mila.12302

Cite This Page:

Ruhr-University Bochum. “What it means when animals have beliefs: Chimpanzees, some dog species and even scrub jay and crows have beliefs..” ScienceDaily. ScienceDaily, 17 June 2020. www.sciencedaily.com/releases/2020/06/200617145957.htm

Pets can reduce food allergies in children

Previous research has shown that living with animals can reduce allergies in children such as airborne and food allergies. Now a recent study has confirmed and strengthened this finding.

Researcher Hisao Okabe from the Fukushima regional Center for the Japan Environment and Children’s Study and colleagues studied over 65,000 young children who lived with dogs and cats and found that they had less food allergies than children who do not live with pets.

About 22% were exposed to indoor dogs and cats during their fetal stage and showed a significant reduction in food allergies. It is interesting that the study showed that children exposed to outdoor dogs had no significant reduction in food allergies.

The children who were exposed to indoor dogs were less likely to be allergic to eggs, milk and nuts. The children who were exposed to indoor cats had a lower instance of allergies to eggs, wheat and soybeans. Yet those children who were exposed to hamsters had a higher rate of allergies to nuts.

This study did not go into detail about why this occurred but it is interesting that it did.

Journal Reference:

  1. Hisao Okabe, Koichi Hashimoto, Mika Yamada, Takashi Ono, Kazufumi Yaginuma, Yohei Kume, Mina Chishiki, Akiko Sato, Yuka Ogata, Karin Imaizumi, Tsuyoshi Murata, Hyo Kyozuka, Kosei Shinoki, Seiji Yasumura, Hidekazu Nishigori, Keiya Fujimori, Mitsuaki Hosoya. Associations between fetal or infancy pet exposure and food allergies: The Japan Environment and Children’s StudyPLOS ONE, 2023; 18 (3): e0282725 DOI: 10.1371/journal.pone.0282725

Finding a Lost Cat

            In many ways looking for a lost cat can be easier than looking for a lost dog. This is because most cats stay very close to home whereas dogs can run for miles. On the flip side, cats can hide in very small places, making it more difficult to see them.

            If the cat is an indoor/outdoor cat, the chances are that the cat is staying away from home on purpose. I have seen cats spend hours waiting for a chipmunk to pop out of a bush or a hole. Sometimes the cat will wander away from the last place they saw the chipmunk only to return an hour later to wait again. While you are frantically looking for your cat, the cat is having a grand old-time hunting. Few cats will come when called in a situation such as this.

            If your cat is an indoor cat and not used to being outside, it is very likely that the cat is frightened. In this case the cat will find a hiding place and most likely stay there. It depends on the cat’s relationship with his owner and how frightened he is whether he will come if you call him. If the area around your house is quiet, the cat is more likely to come out.

         Regardless of which type of cat you have, as soon as you determine that the cat is missing you should act right away. Below are a few steps that you can take to help find your cat. It depends on your cat’s personality and experiences which will work the best, so to be safe, try all the tips.

         Unless you saw your cat run outside, the first thing you must do is search your home. Sometimes a cat will hide in the house. This is especially true if there is unusual activity in your home. If there is going to be unusual activity in your home, it is best to lock your cat in a room or a crate so that the cat cannot hide somewhere where you will not find him or become so frightened that he will run out of an opened door. A cat that runs out of your home in fear will be less likely to come back to your home right away.

         When you search in your home (and outdoors) never underestimate your cat’s ability to squeeze into very small places. If you find your cat in an inaccessible (for you) small space in your home, and the cat can get out on his own, leave him alone, he will come out when he feels safe. Be sure to check attics, basements and closets.

         If your cat is outdoors, check around your home. Most cats will stay within 2 – 3 houses from yours. They typically do not go more than 1/3 of a mile. Be sure to look in every outbuilding even if you think it is impossible for the cat to be there. Check roofs, trees, under porches and in any small space that might be available to your cat. This can include under rocks that form a small “cave.”

         Next search your neighborhood. Be sure to have a photo of your cat to help people identify your cat. If you can, ask friends to help you canvass the area around your home. Knock on doors and show neighbors a picture of your cat and leave your contact information.

         Post flyers around your neighborhood. Be sure to include a picture of your cat on the flyer. Also keep a record of where you post the flyers. Check them every three days to freshen them as needed. People will assume if a flyer is old that your cat has been found.

         Contact all animal related business in your area. This will include veterinary clinics, pet stores, shelters, cat rescue groups and 4-H clubs. You can also contact child groups such as the girl and boy scouts. Post flyers at any store or restaurant that will allow you to do so. Since a person may find your cat and take them to a shelter, you will want to extend your search to five or ten miles away.

         Take advantage of social media. Also check the lost and found section of your newspaper. Some people only read the weekend editions of their newspaper so place an ad in the weekend edition as well as the daily edition. Many newspapers will let you post an ad for free.

         Keep the ad, posters and social media fresh and up to date. If you find your cat, it is very important to let all the organizations know that the cat was found. Remove all posters as well.

         At your home you can put a litter box outside and articles of clothing that has your scent on it, such as an old tee shirt or shoes. Also leave a bowl of water and food for your cat. I like to get play sand that is used in children’s sand boxes and spread it on the ground around the food and water. This way if another animal comes to eat the food you will know by the tracks that it was not your cat. If another cat comes to your food, you will know that it is a cat and hope that it is your cat. If you have access to one, or if you want to purchase one, you can mount a wildlife camera outside to see if your cat is coming to the food.

         You can also put the cat’s bedding in a cardboard box with a hole cut in it big enough for your cat to enter. Be sure to secure the box so that it will not blow away or be unstable. You cat may be lured to this familiar, safe place.

         Also consider that the best time to search for your cat is at night after midnight when the surrounding area is quieter. At that time you can open a can of food if your cat knows that sound, it may attract him to you. When you do this, be patient, sound travels quiet far at night so your cat may not come running to you right away. Instead he may wait to be sure that it is safe and slowly approach you. If you do this in the same location every night, your cat may come out the second or third night. If you see your cat, stay calm and let your cat come to you. If you try to catch your cat you may frighten him, and he will be hesitant to approach you again. Be sure to leave the can of food outside in the same place you opened it.

         If you have recently moved, be sure to search your old neighborhood using the same methods. Cats have an amazing homing instinct. Searching your old neighborhood is especially necessary if your cat is an indoor/outdoor cat.  If you have moved too far away to do this, ask former neighbors and friends to help you.

         The most important thing is not to give up. Cats have been known to return home months after disappearing. Although it is heartbreaking to not find your cat, in many cases people find a cat and assume it is a stray that has been dumped and keep him, giving him a good home. If this happens and your cat is kept indoors, he will not be able to get back to you unless he gets out again and comes home. Which is why some cats come back months after they disappear. So never give up.

Fearful cats and socialization

Doctoral Researcher Salla Mikkola from the University of Helsinki and the Folkhälsan Research Center wanted to look into what causes behavior problems in cats such as fearfulness, aggression towards people and excessive grooming.  

What they found out is important, and that is socialization when cats are kittens with people is very important. Cats under the age of twelve weeks who only came in contact with strange people and children a few times or more fearful than kittens who interacted with strangers on a weekly basis. Fearful cats had more litterbox, aggression and excessive grooming issues.

The researchers noted that there were less fearfulness and aggression in cats when the cat lived with another cat.

Mimi who is partly blind

Sue’s Note: People tend to associate socialization with puppies and dogs but it is just as important to socialize cats. This should include handling all body parts, grooming, traveling in a vehicle, being put in a carrier, and exposure to noise that is not excessively loud. It is very important to make sure that the cat is not physically handicapped which can cause the cat to become frightened. For example, my cat was born with limited vision that is not detectable by a physical examination and was only apparent by observing her behavior. Many people do not realize that cats are very social and do best if there is at least one other cat in the home.

Journal Reference:

Salla Mikkola, Milla Salonen, Emma Hakanen, Hannes Lohi. Fearfulness associates with problematic behaviors and poor socialization in catsiScience, 2022; 25 (10): 105265 DOI: 10.1016/j.isci.2022.105265

Death, Decomposition, and Detection Dogs

Death, Decomposition, and Detection Dogs: From Science to SceneBy Susan M. Stejskal, LVT, PhD. Published by CRC Press, Second Edition, 2023, $54.95, 259 pgs.

I love this book. It is very well written; the quality of the cover and pages are excellent. It has informative diagrams and color photos. The book thoroughly researched and covers the topic extremely well. Because the author explains in easy-to-understand terms all of the technical aspects of body decomposition, this book is easy to read. There are nine chapters covering a variety of topics which include forensic tools, a dog’s nose, how a body decomposes, the role that bugs play in forensics, how the environment impacts decomposition, electronic detection devices and what is very interesting, actual case studies.

This book is a must have for canine search and rescue handlers, police, fire fighters, those who study forensics, and authors who write murder mysteries or include a death in their stories.

Pigeons can solve problems the same as artificial intelligence

We are always learning more about the mind of animals and this new study showed that pigeons share similarities with artificial intelligence.

Psychologists at the University of Iowa wanted to test the intelligence of pigeons and devised some very interesting and unique tests.

When the pigeons were given complex tests that involved categorization that did not allow them to use logic and reasoning, but instead made them memorize scenarios, they were able to pass the tests about 70% of the time.

free google photo

The tests involved showing the pigeon a stimulus and required the pigeon to choose which category the stimulus belonged to. The categories included line width, angle, concentric rings and sectioned rings. These tests were so arbitrary that no rules or logic would help solve the problem. What made them even more difficult was that each stimulus was special, never repeated and did not look like one another. It required memorization to do the task.

The pigeons were able to solve the problems by using their biological algorithm and employing associative learning. Computers on the other hand, use artificial algorithms that people programed into them.

Sue’s note: How amazing are the animals we share our lives with. It is exciting to think of what other tests might show how intelligent other birds and animals are.  

Swamp cancer (pythiosis) in animals

Swamp cancer has been around for a long time worldwide. It was first reported in 1884 and is typically limited to tropical and subtropical areas that include, Thailand, India, Brazil and states in the U.S. that border the Gulf of Mexico. Although recently it has been reported in northern area of the U.S.

Pythiosis causes either non-healing sores on the skin or lesions internally. Dogs that contract Pythiosis and are not treated, typically live less than one month. Horses and other animals can also contract pythiosis.

Pythiosis is caused by organisms that are similar to fungus but are related to algae, often called water molds. As the name suggests, they need water to survive. They are found in stagnant water including ponds, swamps and bayous but they are also found in moist soil, grasses and aquatic vegetation. The mold is attracted to human and horse hair as well as the skin of animals.

An animal can contract it by rubbing against or eating vegetation, wading or swimming in contaminated water or drinking or getting the water in their mouth. Hunting dogs are a prime candidate and studies have shown that for an unknown reason, German Shepherd Dogs also have a higher instance of Pythiosis.

In the skin form of the disease a dog will have non-healing wounds that will not respond to antibiotics. The wound will grow, drain pus and the tissue will die. In the internal form of the disease the dog may vomit, have diarrhea which will be watery and bloody. The dog may lose his appetite and thus weight. Masses may form on various organs in the body.

There are tests that a veterinarian can use to help determine if the dog has pythiosis and veterinarians at the University of Florida College of Veterinary Medicine are working to find a cure. If your dog has pythiosis you can contact them to partake of a pilot study for treatment of this disease.

Contact the University of Florida Small Animal Hospital at (352) 392-2235 or complete the study interest form at https://research.vetmed.ufl.edu/clinical-trials/contact-us/

 to see if their dog qualifies.