Are Dogs Pack Animals?
written by jean donaldson
tuesday, 28 april 2009 09:04
When I first got into dog training, the mantra was “dogs are pack animals.” It was never questioned: dogs were strong bonding animals and fit into human families so well, sometimes to the point of developing bona fide disorders like separation anxiety. And a lot of behavior was deconstructed with social hierarchies in mind. Nobody examined what dogs do when they are not inserted into human families, i.e. are free-ranging. So a while ago I took a look at what is known about feral or semi-feral populations of dogs around the world. It turns out there are many such populations.
During the tenure of dictator Nicolae Ceaucescu, a poorly thought out reconstruction effort in Romania resulted in the demolition of thousands of houses and the relocation of thousands of families into small apartments throughout the country. For family dogs, this meant being turned out onto the street, where they have multiplied and eked out a marginal existence ever since.
A sad situation from every possible angle, the explosion of free-ranging dogs in Romania is an unintended experiment that challenges one of the most taken for granted aphorisms in the dog behavior world: that dogs are “pack animals.” The dogs in Romania have not formed packs. Their associations with one another are brief and casual: a couple of dogs may hang out together temporarily and then part company. Dogs are often drawn together by a scarce resource like a food source or estrous female but once this magnet is gone, they go their separate ways.
This contrasts with wolves who, while a genetically identical species to dogs, live in packs. As explained by University of Minnesota biologist David Mech, each pack is a nuclear family consisting of a breeding pair and their offspring. When the offspring reach maturity around two years of age, they disperse to avoid inbreeding depression and, if they live long enough, mate up and start their own packs.
The social lives of Romanian dogs may be the exception that proves the rule, so it’s necessary to examine all free-ranging populations in order to formulate a stronger hypothesis about dog social behavior.
Significant populations of free-ranging domestic dogs exist in sub-Saharan Africa, South America, India, Mexico, Tasmania (Cook Island Dogs), Hawaii, Bangkok and, in a situation paralleling that of Romania, in Moscow. Pariah dogs on the Indian subcontinent are thought to be the longest-running continuous population of feral dogs - on the order of 14,000 years, nearly as long as archaeological evidence has existed for domestic dogs.
There are cases of dogs buddying up with one or more dogs for days at a time, and dogs being drawn into proximity to each other by food sources, however none of the above populations form packs the way wolves do. Males, in fact, do not participate in the rearing of puppies, which is the foundation of a wolf pack. And, scavenging far outpaces hunting as primary food-acquisition activity, another difference from wolves, who hunt.
By contrast, the accounts regarding the social behavior of Dingoes are much more conflicting. Often the same source will in one paragraph say that Dingoes are primarily loners that only occasionally pack up with a few others to take down a large prey item and later state that Dingoes are pack animals with stable hierarchies, a la Gray Wolf. Recent genetics research has allowed for the teasing out of pure Dingoes from Dingo-dog hybrids most of the time. Interestingly, hybrids are often outwardly indistinguishable from pure Dingoes to an untrained eye. So to be generous, it could be that the disagreement between (and within) sources is partially due to some observations being of mixed ancestry animals and some of pure Dingoes.
A colleague of mine who has made trips to the Cook Islands to provide veterinary care to the feral dog population was struck by two things: the large numbers of short-legged dogs, and the absence of social cohesiveness. She fully expected and looked for packs, having heard and parroted for years, as have I, the party line of “dogs are pack animals.” Again and again, she witnessed what Dunbar has termed “loose, transitory associations” rather than packs.
If we are to support our contention that dogs are pack animals, we will need to account for these many populations where dogs, in the absence of the glue of human confinement and husbandry, simply do their own thing.
Showing posts with label behavior. Show all posts
Showing posts with label behavior. Show all posts
Tuesday, August 2, 2011
Thursday, March 31, 2011
Long-Term Health Risks and Benefits Associated with Spay / Neuter in Dogs
Long-Term Health Risks and Benefits Associated with Spay / Neuter in Dogs Laura J. Sanborn, M.S. May 14, 2007 Precis
At some point, most of us with an interest in dogs will have to consider whether or not to spay / neuter our pet. Tradition holds that the benefits of doing so at an early age outweigh the risks. Often, tradition holds sway in the decision-making process even after countervailing evidence has accumulated. Ms Sanborn has reviewed the veterinary medical literature in an exhaustive and scholarly treatise, attempting to unravel the complexities of the subject. More than 50 peer-reviewed papers were examined to assess the health impacts of spay / neuter in female and male dogs, respectively. One cannot ignore the findings of increased risk from osteosarcoma, hemangiosarcoma, hypothyroidism, and other less frequently occurring diseases associated with neutering male dogs. It would be irresponsible of the veterinary profession and the pet owning community to fail to weigh the relative costs and benefits of neutering on the animal’s health and well-being. The decision for females may be more complex, further emphasizing the need for individualized veterinary medical decisions, not standard operating procedures for all patients.
No sweeping generalizations are implied in this review. Rather, the author asks us to consider all the health and disease information available as individual animals ar evaluated. Then, the best decisions should be made accounting for gender, age, breed, and even the specific conditions under which the long-term care, housing and training of the animal will occur.
This important review will help veterinary medical care providers as well as pet owners make informed decisions. Who could ask for more?
Larry S. Katz, PhD Associate Professor and Chair Animal Sciences Rutgers University New Brunswick, NJ 08901
INTRODUCTION
Dog owners in America are frequently advised to spay/neuter their dogs for health reasons. A number of health benefits are cited, yet evidence is usually not cited to support the alleged health benefits. When discussing the health impacts of spay/neuter, health risks are often not mentioned. At times, some risks are mentioned, but the most severe risks usually are not. This article is an attempt to summarize the long-term health risks and benefits associated with spay/neuter in dogs that can be found in the veterinary medical literature. This article will not discuss the impact of spay/neuter on population control, or the impact of spay/neuter on behavior.
Nearly all of the health risks and benefits summarized in this article are findings from retrospective epidemiological research studies of dogs, which examine potential associations by looking backwards in time. A few are from prospective research studies, which examine potential associations by looking forward in time.
SUMMARY
An objective reading of the veterinary medical literature reveals a complex situation with respect to the longterm health risks and benefits associated with spay/neuter in dogs. The evidence shows that spay/neuter correlates with both positive AND adverse health effects in dogs. It also suggests how much we really do not yet understand about this subject.
On balance, it appears that no compelling case can be made for neutering most male dogs, especially immature male dogs, in order to prevent future health problems. The number of health problems associated with neutering may exceed the associated health benefits in most cases.
On the positive side, neutering male dogs
• eliminates the small risk (probably <1%) of dying from testicular cancer
• reduces the risk of non-cancerous prostate disorders
• reduces the risk of perianal fistulas
• may possibly reduce the risk of diabetes (data inconclusive) On the negative side, neutering male dogs
• if done before 1 year of age, significantly increases the risk of osteosarcoma (bone cancer); this is a common cancer in medium/large and larger breeds with a poor prognosis.
• increases the risk of cardiac hemangiosarcoma by a factor of 1.6
• triples the risk of hypothyroidism
• increases the risk of progressive geriatric cognitive impairment
• triples the risk of obesity, a common health problem in dogs with many associated health problems • quadruples the small risk (<0.6%) of prostate cancer
• doubles the small risk (<1%) of urinary tract cancers
• increases the risk of orthopedic disorders
• increases the risk of adverse reactions to vaccinations
For female dogs, the situation is more complex. The number of health benefits associated with spaying may exceed the associated health problems in some (not all) cases. On balance, whether spaying improves the odds of overall good health or degrades them probably depends on the age of the female dog and the relative risk of various diseases in the different breeds. On the positive side, spaying female dogs
• if done before 2.5 years of age, greatly reduces the risk of mammary tumors, the most common malignant tumors in female dogs
• nearly eliminates the risk of pyometra, which otherwise would affect about 23% of intact female dogs; pyometra kills about 1% of intact female dogs
• reduces the risk of perianal fistulas
• removes the very small risk (0.5%) from uterine, cervical, and ovarian tumors On the negative side, spaying female dogs
• if done before 1 year of age, significantly increases the risk of osteosarcoma (bone cancer); this is a common cancer in larger breeds with a poor prognosis
• increases the risk of splenic hemangiosarcoma by a factor of 2.2 and cardiac hemangiosarcoma by a factor of >5; this is a common cancer and major cause of death in some breeds
• triples the risk of hypothyroidism
• increases the risk of obesity by a factor of 1.6-2, a common health problem in dogs with many associated health problems
• causes urinary “spay incontinence” in 4-20% of female dogs
• increases the risk of persistent or recurring urinary tract infections by a factor of 3-4
• increases the risk of recessed vulva, vaginal dermatitis, and vaginitis, especially for female dogs spayed before puberty
• doubles the small risk (<1%) of urinary tract tumors
• increases the risk of orthopedic disorders
• increases the risk of adverse reactions to vaccinations One thing is clear – much of the spay/neuter information that is available to the public is unbalanced and contains claims that are exaggerated or unsupported by evidence.
Rather than helping to educate pet owners, much of it has contributed to common misunderstandings about the health risks and benefits associated of spay/neuter in dogs. The traditional spay/neuter age of six months as well as the modern practice of pediatric spay/neuter appear to predispose dogs to health risks that could otherwise be avoided by waiting until the dog is physically mature, or perhaps in the case of many male dogs, foregoing it altogether unless medically necessary.
The balance of long-term health risks and benefits of spay/neuter will vary from one dog to the next. Breed, age, and gender are variables that must be taken into consideration in conjunction with non-medical factors for each individual dog. Across-the-board recommendations for all pet dogs do not appear to be supportable from findings in the veterinary medical literature.
SEE ENTIRE ARTICLE AT: http://www.naiaonline.org/pdfs/LongTermHealthEffectsOfSpayNeuterInDogs.pdf
At some point, most of us with an interest in dogs will have to consider whether or not to spay / neuter our pet. Tradition holds that the benefits of doing so at an early age outweigh the risks. Often, tradition holds sway in the decision-making process even after countervailing evidence has accumulated. Ms Sanborn has reviewed the veterinary medical literature in an exhaustive and scholarly treatise, attempting to unravel the complexities of the subject. More than 50 peer-reviewed papers were examined to assess the health impacts of spay / neuter in female and male dogs, respectively. One cannot ignore the findings of increased risk from osteosarcoma, hemangiosarcoma, hypothyroidism, and other less frequently occurring diseases associated with neutering male dogs. It would be irresponsible of the veterinary profession and the pet owning community to fail to weigh the relative costs and benefits of neutering on the animal’s health and well-being. The decision for females may be more complex, further emphasizing the need for individualized veterinary medical decisions, not standard operating procedures for all patients.
No sweeping generalizations are implied in this review. Rather, the author asks us to consider all the health and disease information available as individual animals ar evaluated. Then, the best decisions should be made accounting for gender, age, breed, and even the specific conditions under which the long-term care, housing and training of the animal will occur.
This important review will help veterinary medical care providers as well as pet owners make informed decisions. Who could ask for more?
Larry S. Katz, PhD Associate Professor and Chair Animal Sciences Rutgers University New Brunswick, NJ 08901
INTRODUCTION
Dog owners in America are frequently advised to spay/neuter their dogs for health reasons. A number of health benefits are cited, yet evidence is usually not cited to support the alleged health benefits. When discussing the health impacts of spay/neuter, health risks are often not mentioned. At times, some risks are mentioned, but the most severe risks usually are not. This article is an attempt to summarize the long-term health risks and benefits associated with spay/neuter in dogs that can be found in the veterinary medical literature. This article will not discuss the impact of spay/neuter on population control, or the impact of spay/neuter on behavior.
Nearly all of the health risks and benefits summarized in this article are findings from retrospective epidemiological research studies of dogs, which examine potential associations by looking backwards in time. A few are from prospective research studies, which examine potential associations by looking forward in time.
SUMMARY
An objective reading of the veterinary medical literature reveals a complex situation with respect to the longterm health risks and benefits associated with spay/neuter in dogs. The evidence shows that spay/neuter correlates with both positive AND adverse health effects in dogs. It also suggests how much we really do not yet understand about this subject.
On balance, it appears that no compelling case can be made for neutering most male dogs, especially immature male dogs, in order to prevent future health problems. The number of health problems associated with neutering may exceed the associated health benefits in most cases.
On the positive side, neutering male dogs
• eliminates the small risk (probably <1%) of dying from testicular cancer
• reduces the risk of non-cancerous prostate disorders
• reduces the risk of perianal fistulas
• may possibly reduce the risk of diabetes (data inconclusive) On the negative side, neutering male dogs
• if done before 1 year of age, significantly increases the risk of osteosarcoma (bone cancer); this is a common cancer in medium/large and larger breeds with a poor prognosis.
• increases the risk of cardiac hemangiosarcoma by a factor of 1.6
• triples the risk of hypothyroidism
• increases the risk of progressive geriatric cognitive impairment
• triples the risk of obesity, a common health problem in dogs with many associated health problems • quadruples the small risk (<0.6%) of prostate cancer
• doubles the small risk (<1%) of urinary tract cancers
• increases the risk of orthopedic disorders
• increases the risk of adverse reactions to vaccinations
For female dogs, the situation is more complex. The number of health benefits associated with spaying may exceed the associated health problems in some (not all) cases. On balance, whether spaying improves the odds of overall good health or degrades them probably depends on the age of the female dog and the relative risk of various diseases in the different breeds. On the positive side, spaying female dogs
• if done before 2.5 years of age, greatly reduces the risk of mammary tumors, the most common malignant tumors in female dogs
• nearly eliminates the risk of pyometra, which otherwise would affect about 23% of intact female dogs; pyometra kills about 1% of intact female dogs
• reduces the risk of perianal fistulas
• removes the very small risk (0.5%) from uterine, cervical, and ovarian tumors On the negative side, spaying female dogs
• if done before 1 year of age, significantly increases the risk of osteosarcoma (bone cancer); this is a common cancer in larger breeds with a poor prognosis
• increases the risk of splenic hemangiosarcoma by a factor of 2.2 and cardiac hemangiosarcoma by a factor of >5; this is a common cancer and major cause of death in some breeds
• triples the risk of hypothyroidism
• increases the risk of obesity by a factor of 1.6-2, a common health problem in dogs with many associated health problems
• causes urinary “spay incontinence” in 4-20% of female dogs
• increases the risk of persistent or recurring urinary tract infections by a factor of 3-4
• increases the risk of recessed vulva, vaginal dermatitis, and vaginitis, especially for female dogs spayed before puberty
• doubles the small risk (<1%) of urinary tract tumors
• increases the risk of orthopedic disorders
• increases the risk of adverse reactions to vaccinations One thing is clear – much of the spay/neuter information that is available to the public is unbalanced and contains claims that are exaggerated or unsupported by evidence.
Rather than helping to educate pet owners, much of it has contributed to common misunderstandings about the health risks and benefits associated of spay/neuter in dogs. The traditional spay/neuter age of six months as well as the modern practice of pediatric spay/neuter appear to predispose dogs to health risks that could otherwise be avoided by waiting until the dog is physically mature, or perhaps in the case of many male dogs, foregoing it altogether unless medically necessary.
The balance of long-term health risks and benefits of spay/neuter will vary from one dog to the next. Breed, age, and gender are variables that must be taken into consideration in conjunction with non-medical factors for each individual dog. Across-the-board recommendations for all pet dogs do not appear to be supportable from findings in the veterinary medical literature.
SEE ENTIRE ARTICLE AT: http://www.naiaonline.org/pdfs/LongTermHealthEffectsOfSpayNeuterInDogs.pdf
Tuesday, October 26, 2010
Help is HERE!
Behavior Call Line
Your training ANSWER for over 25 years!
CALL TODAY (413) 559-7011
Our behavior line may the answers you are looking for!
There are many behavioral issues and concerns that we can be helped right over the phone.
Common issues our Behavior Line encounters:
•Is it aggression or not ?
•Problems with a new puppy or dog (chewing, barking, etc)
•Introducing a new dog or other pet
•Counter Surfing and Begging
•Crate training and housebreaking
•Basic problem solving
•And so much more…
The next step is calling us at 413-559-7011
or email us at info@leadingthewaydogtraining.com
We will schedule your exclusive consultation. We may even be able to help you TODAY.
Your training ANSWER for over 25 years!
CALL TODAY (413) 559-7011
Our behavior line may the answers you are looking for!
There are many behavioral issues and concerns that we can be helped right over the phone.
Common issues our Behavior Line encounters:
•Is it aggression or not ?
•Problems with a new puppy or dog (chewing, barking, etc)
•Introducing a new dog or other pet
•Counter Surfing and Begging
•Crate training and housebreaking
•Basic problem solving
•And so much more…
The next step is calling us at 413-559-7011
or email us at info@leadingthewaydogtraining.com
We will schedule your exclusive consultation. We may even be able to help you TODAY.
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