Neutering significantly increases the risk of bladder and prostate cancer.
Several older studies have shown that the incidence of prostate cancer is increased in neutered males. In 2007, in an attempt to verify the results, yet another study was done on the effects of neutering on the male urogenital tract.
The results were shocking.
Neutered dogs were four times more likely to suffer from malignant bladder cancer than intact dogs.
Neutered dogs were eight times more likely to suffer from prostate transitional cell carcinoma than intact dogs.
They were twice as likely to suffer from prostate adenocarcinoma, and four times as likely to suffer from prostate carcinoma. On average, castrated dogs are three times more likely than their intact counterparts to develop some type of prostate cancer.
However, to keep the situation in perspective, the overall incidence of these cancers is low, around 1-2% of all dogs. Risk can also vary by breed and increases with age.
Neutering obviously eliminates the risk of testicular cancer because, well, the testicles are now gone. Since testicles are a source of the hormone testosterone, the influence of that hormone on the body will be minimized. Benign prostate enlargement is exacerbated by testosterone, as is infection of the prostate, so if your dog develops either of these conditions, he can easily be treated by castration at the time of diagnosis. "Benign" means the condition is not life-threatening, and will improve with treatment. Prostate and bladder cancers, on the other hand, are not as easily treated and may well kill your dog.
Just a bit more information to follow up on the post earlier this month "Rethinking Spay and Neuter". Oddly enough, there are many veterinary websites out there claiming that neutering reduces risk of prostate cancer.
Really? It seems the truth is politically incorrect, or perhaps the truth is just too inconvenient for some people to admit.
Thursday, December 30, 2010
Thursday, December 9, 2010
Dogs and the Ethics of Training
This article originally appeared in the December 3, 2010 issue of Dog News.
It’s a fact that many of the breeds we have today were originally bred to do some very tough jobs. We have mastiff breeds which were dogs of war at one time. We have terriers who not only bolted but killed fox and vermin. We have sighthounds who coursed wolves, deer and hare; and we have other hounds who could corner bear, raccoons, and wild boar.
Times change, of course. Bear baiting was made illegal in England in 1835, resulting in changes to many breeds which had been used for that sport. Breeders worked hard to change the temperament of many of the bully breeds which had been used for bear baiting prior to that time, making them excellent family pets today.
However, there are many breeds today which are still used for their original purposes, at least part-time. Greyhounds still race and course. Many sporting dogs are still used as working bird dogs. And foxhounds and other treeing hounds are still used for hunting.
Recently in South Carolina the Humane Society of the United States (HSUS) released film footage of the practice of bear “baying.” This is a training exercise during which a bear is staked out in a pen and hunting dogs (in this case Plott hounds) are taught how to attack the bear without getting hurt. The bear is not allowed to be hurt either.
You’re probably wondering why anyone would want to do such a thing. The answer is that Plott hounds are still used for actual bear hunting. They corner or tree bears and, in an actual hunting situation, the dogs need to know how to approach a bear without being torn to shreds. It’s the dogs’ job to hold the bear in place until the hunter can arrive on the scene. Presumably, if you simply take the dogs out to hunt without any training or experience they would be at greater risk of being killed by a bear they try to tree or corner. So, bear baying serves a training purpose.
South Carolina seems to be the only state where bear baying is still legal, according to HSUS.
Now, is bear baying a pleasant experience for a bear? I’m sure it’s not. Does it prepare the dogs for meeting a bear under actual hunting circumstances in the woods? It seems likely that it does. Is bear baying something that I personally approve of? That’s not really relevant. Done properly, the bear is not supposed to be injured during bear baying as the dogs are supposed to learn how to hold the bear in place without injuring the bear or being injured themselves. That’s the whole point of the training.
You should keep in mind, too, that bear “baying” is NOT the same thing as bear baiting, which was a bloody sport which resulted in the death of the animal.
This case has become important for several reasons. The American Kennel Club asked the American Plott Association to disavow bear baying and the club refused to do so. As a result, the AKC has severed ties with the parent club over this issue.
It’s easy to sympathize with the bear in this instance, but it’s important to remember the purpose of this training: to keep dogs safer during hunting.
This is not an easy issue. Before you decide that the AKC is correct in this instance, consider that there are many breeds which have advanced training which could be construed as being “cruel” by some observers. For example, shepherds and sheepdog trainers often train herding dogs with cows and sheep which will give them a kick in order to teach them better herding and nipping skills. Some gundog trainers in the U.S. use electronic collars, which are considered “cruel” in the UK — the Kennel Club in Britain is seeking to have them banned by the government. Hunting fox, deer and hare with dogs in the UK is banned as cruel, despite the fact that we have countless breeds which were developed for these purposes. There are people in the United States who believe it’s cruel to use hounds to course hare and other animals.
Just where do you draw the line?
In this case, HSUS has produced, once again, a video that certainly looks terrible, on first viewing. It looks like a bear is being abused by dogs. However, there is often more to consider. I would hate for any dogs to die during hunting because they were not properly trained, especially when bears are not physically harmed during the training process.
Many of us have breeds with long historical traditions. We’re proud of those traditions and some people try to maintain them as much as possible today. That’s not easy to do in an increasingly urban world. I don’t think we should be so quick to label those traditions “cruel” or try to eliminate them, especially without more evidence or without making more effort to understand them. Afterall, part of our job as breed custodians is to maintain our breeds and their traditions. That includes the work that our dogs were bred to do.
Wednesday, December 8, 2010
By Geneva Coats, R.N.
Secretary, California Federation of Dog Clubs
Pet sterilization has become widely regarded as a routine procedure that is purely beneficial. Most breeders today sell companion puppies under contracts requiring spay or neuter as a condition of sale.(6) Ingrained in recent popular culture is the notion that pet overpopulation is a serious concern, and that to prevent the deaths of animals in shelters all pets should be sterilized. To bolster the campaign for pet sterilization, we have further been informed that a sterilized pet is happier, healthier and longer-lived than one who remains intact.
Should we believe these widely circulated ideas that “everybody knows?” What are the facts?
In the mid-twentieth century, there was an abundance of pets; many were available “free to good home” via newspaper ads. Few pets were sterilized, and many people unwisely allowed their dogs to roam the neighborhood. Consequently, there were many unplanned litters produced by family pets.
According to “Maddie’s Fund” president Richard Avanzino, in the 1970s, our country’s animal control agencies were killing, on average, about 115 dogs and cats annually for every 1000 human residents. This amounted to about 24 million shelter deaths every year.(2) Avanzino is also the former executive director of the San Francisco SPCA, and is regarded by many as the founder of the modern no-kill movement in the US.
"The Problem" of too many pets and not enough homes to go around was ingrained into the public psyche. To deal with “The Problem” of massive shelter killings, a huge public awareness campaign was initiated. The importance of spaying and neutering pets was emphasized. Vets began to routinely urge their clients to sterilize their pets as an integral part of being a “responsible owner”. Planned breeding became a politically incorrect activity. A popular slogan that persists today is “Don’t breed or buy, while shelter dogs die.”
The crusade for spaying and neutering pets has been very successful. A 2009-2010 national pet owners’ survey by the American Pet Products Manufacturers Association reveals that the vast majority of owned pets...75% of dogs and 87% of cats... are spayed or neutered.
In recent years, according to Avanzino, annual shelter death numbers have dramatically declined to about 12 per thousand human residents, or about 3.6 million deaths each year. This amounts to a staggering 85% reduction in killing since the 1970s.(2) We have reached a nationwide pet shelter death rate that averages just 1.2% per population. This can effectively be considered a “no kill” rate.
In most areas, feral cats and kittens account for the majority of shelter numbers.(9) Several areas of the country have actual shortages of adoptable dogs, particularly purebreds and puppies, and must import from other regions to fill the need. Dogs are being smuggled into the US by the thousands. Some rescue groups are even importing from other countries….Mexico, Brazil, the Caribbean, Taiwan and Romania, to name some of the most popular points of origin. The conservative estimate is that 300,000 dogs are imported into the US each year to meet the demand for pets.(3)
According to shelter expert Nathan Winograd, every year in this country, approximately 3 million adoptable pets die in shelters.* At the same time, each year around 17 million US households are looking for a new pet. That is 17 million households above and beyond those who already will adopt a shelter or rescue pet. There are nearly six times as many homes opening up every year as the number of adoptable pets killed in shelters!(8) It seems the greatest challenge these days is to find ways to match up the adoptable pets with the homes that are waiting for them. Breed rescues fill this niche admirably, but are privately funded and desperately in need of assistance in order to effectively perform this service. Perhaps some of the public funds budgeted for shelters to kill animals could be better spent helping rescue groups who are proactive in matching adoptable pets to suitable homes.
SPAY/NEUTER AND HEALTH
Now that we have addressed the issue of pet overpopulation, let’s examine the claim that sterilization surgery promotes better health. While there are some benefits to sterilization, there are some drawbacks as well.
Sterilization will naturally serve to prevent any unwanted litters. In bitches, spaying will greatly reduce the risk of breast cancer, pyometra, perianal fistula and cancers of the reproductive organs.(5)
Spay surgery itself carries a somewhat high rate (around 20%) of complications such as infection, hemorrhage and even death.(5) Spaying significantly increases the rate of urinary incontinence in bitches….about 20-30% of all spayed bitches will eventually develop this problem. This is believed to be most likely caused by the lack of estrogen that results from being spayed.(1)
Sterilization of males may reduce some unwanted sexual behaviors, but there are few other proven benefits to neutering a male dog. Testicular cancer is prevented, but the actual risk of that cancer is extremely low (<1%) among intact dogs. Contrary to popular belief, studies show that the risk of prostate cancer is actually HIGHER in neutered dogs than in their intact counterparts.(5)
Other studies prove significant health risks associated with sterilization, particularly when done at an early age. The most problematic is a delayed closure of the bony growth plates. This results in an abnormal, “weedy” skeletal development that increases the incidence of orthopedic problems like hip dysplasia and patellar luxation. Working and performance dogs, if neutered before maturity, risk the inability to perform the jobs they were bred for.(10)
But by far the most startling news to surface this year is the result of a study that shows that keeping ovaries to the age of six years or later is associated with a greater than 30% increase of lifespan in female Rottweilers.(4) Similar studies in humans reinforce this finding.(7)(11)
A 30% longer lifespan means that you could have many additional years with your bitch simple by delaying spay surgery until middle-age or later.
Behavioral studies show that sterilization increases fearfulness, noise phobias and aggression. Other well-documented adverse health effects of de-sexing include increased risk of bone cancer, hemangiosarcoma, hypothyroidism, and cognitive dysfunction in older pets. Sterilization confers an increased susceptibility to infectious disease, and also a higher incidence of adverse reactions to vaccines.(10)
So there is no need to feel obligated to sterilize for health or welfare reasons. But, what about the need to protect the puppies that we sell from unethical breeders?
Many breeders are justifiably very concerned about the possibility of their dogs being subjected to neglect or abuse by falling into disreputable hands. To help prevent such situations, it has become commonplace for breeders to include spay/neuter requirements in their pet sales contract, and/or to sell the dog on a limited registration. Another common stipulation, particularly for a show/breeding dog, is requiring that the dog be returned to the seller in the event the buyer no longer wishes to keep him.(6)
Such contracts are highly effective when selling a puppy to someone who is honest and ethical. However, contracts are easily skirted by the unscrupulous, particularly if the buyer lives in a different region. Someone intent on breeding may do so regardless of contract language, and sell the puppies without any registration. And without personal knowledge of the living conditions at your puppy’s new home, it is impossible to predict what sort of care and attention he or she will receive. Even some show breeders may have very different ideas than the seller of what constitutes proper care. There is no substitute for a home check to follow up that initial puppy application!
Bottom line, the best insurance for a happy future for your puppies is making sure that you get to know the buyer personally. If something about the buyer or his attitude doesn’t seem right, then it’s probably best to cancel the sale. If you wish to sell puppies on spay-neuter agreements you might also consider advising the buyer to wait until the puppy reaches maturity before having sterilization surgery performed. Another idea is to ask your vet if vasectomy would be a viable alternative to castration for your male. This would preserve sex hormones and possibly prevent some of the adverse health effects of castration.
PUREBRED GENE POOLS
Sterilization of all dogs sold as companions may have some unintended adverse effects. The nature of purebred breeding for the show ring involves intense selection that severely narrows the gene pool in many, if not most, breeds. Some breeds started with just a small pool of founders. Through the years, overuse of only a few popular sires further reduced the genetic variety available in the breed. When troublesome health problems surface and become widespread, where can we turn for “new blood”?
The show-bred population of a breed may have become too small as a result of intense inbreeding or the genetic bottleneck created by overuse of popular sires; or the breed gene pool may have become genetically depleted because of unwise selection for specific, sometimes unhealthy physical traits favored in the show ring. As a result, dogs from the “pet” population may actually be the salvation of the breed gene pool.
Trying to guess which dogs are the "best" to keep intact for showing and breeding can be hit-or-miss. Imagine the scenario where a successful show dog eventually develops a heritable health issue, while his brother is much healthier...but brother was neutered long ago, thereby eliminating those good genes forever. What about that Champion's non-show quality sister, who just happens to have good health, great mothering instincts and/or the ability produce exceptional offspring? If sold as a spayed companion, her genes are effectively lost.
And what about the very future of the dog fancy? Many people (myself included) have bought an intact dog as a pet, and only later sparked an interest in showing and breeding. Developing new breeders is critical to the survival of our sport, but if we sell all companions on spay/neuter agreements, we will lose many fanciers before they have the chance to discover the joy of dog breeding and showing!
Sadly, mandatory sterilization laws are sweeping the nation and may further compromise the future of the dog fancy. AKC registrations continue to decline and the push to legally and/or contractually require spay and neuter of most every dog will only worsen that situation. Regardless, there is a huge demand in society for healthy pets; a demand which the responsible breeders could not come close to meeting even if they wanted to...and sometimes, they do not want to. The choice we have as a society is how that demand will be filled.
Many believe that only show hobbyists should be allowed to keep intact dogs and breed on a limited basis. However, the attempt to legally force well-regulated and inspected commercial breeders and the casual small home breeders out of the picture leaves only the unregulated, less visible "underground" producers and smugglers to fill the need for pets. Perhaps it is time to re-think our preconceived notions about who should and shouldn't possess intact dogs!
As a dog owner, one must weigh the risks of sterilization against the benefits in order to make that very personal decision. Popular culture and many veterinarians downplay or even ignore the risks involved with spay/neuter because of their own belief in the need to reduce dog breeding in general. Many people still believe that overpopulation remains a pressing concern and that sterilization always promotes better health. Some even believe that breeding a female is abusive. It seems the animal rights groups have done an excellent job of brainwashing the public on these matters!
As breeders, we may be wise to re-examine the routine request to have all our companion puppies spayed or neutered. The future availability of pets, the perpetuation of the dog fancy, the health of the individual dogs and the gene pools of the breeds that we love may all depend on keeping a few more dogs intact!
*An adoptable pet is one that does not have insurmountable health or temperament issues.
Per California’s Hayden law: The California Legislature Defines No-Kill Terms
■California Law, SB 1785 Statutes of 1998, also known as "The Hayden Law" has defined no-kill terms. What is Adoptable? 1834.4. (a)
"No adoptable animal should be euthanized if it can be adopted into a suitable home. Adoptable animals include only those animals eight weeks of age or older that, at or subsequent to the time the animal is impounded or otherwise taken into possession, have manifested no sign of a behavioral or temperamental defect that could pose a health or safety risk or otherwise make the animal unsuitable for placement as a pet, and have manifested no sign of disease, injury, or congenital or hereditary condition that adversely affects the health of the animal or that is likely to adversely affect the animal's health in the future."
Adoptable dogs may be old, deaf, blind, disfigured or disabled.
REFERENCES AND FURTHER READING
"Puddle Jumping; Canine Urinary Incontinence";
AKC Gazette April 2009
"Reflections from the No Kill Conference in Washington DC":
3James, Susan Donaldson (ABC News)
"300,000 Imported Puppies Prompt Rabies Concerns"
October 24, 2007
4Nolen, R. Scott
"Rottweiler Study Links Ovaries With Exceptional Longevity"
JAVMA March 2010
5Sanborn, Laura J., MS
"Long-Term Health Risks and Benefits Associated with Spay/Neuter in Dogs"; May 14,2007
"The Importance of Spay-Neuter Contracts"
The Orient Express, Nov, 2009
7Waters, David J., DVM, PhD, Diplomate ACVS
"A Healthier Respect for Ovaries"
8 Winograd, Nathan J.
"Debunking Pet Overpopulation"
June 29, 2009
9 Winograd, Nathan, “Redemption: The Myth of Pet Overpopulation and the No Kill Revolution in America” Almaden Books, 2nd edition, Feb 25, 2009.
10 Zink, Christine, DVM, PhD, DACVP
"Early Spay-Neuter Considerations for the Canine Athlete"; 2005
11 “Retaining ovaries may be a key to prolonged life in women and dogs”; DVM Newsmagazine; Dec 5, 2009. http://veterinarynews.dvm360.com/dvm/ArticleStandard/Article/detail/646838