Hi Irene, I have written a lot about this here http://www.thelabradorsite.com/neutering-your-labrador/ There are pros and cons to neutering at all — not just because of the risk of orthapedic problems, but also because of an increased risk in
cancer in neutered dogs (male and female) and also because new studies show that far from improving behavior, neutered dogs seem to have more behavior problems.
There have been several conflicting epidemiological studies over the years that found either an increased risk or a decreased risk of prostate
cancer in neutered dogs.
Not exact matches
Female
dogs that are spayed before their first heat cycle have been shown to have a significantly reduced risk of mammary
cancer, and male
dogs that are
neutered rarely have disease
in their prostate gland.»
The risk of prostate
cancer and enlargement is likely to occur
in 80 % of
dogs who are not
neutered.
For both male and female Rotties spayed or
neutered before one year of age, there was a one
in four lifetime risk for bone
cancer, and the sterilized animals were significantly more likely to develop the disease than intact
dogs of the same breed.
In male
dogs,
neuter surgery protects him against testicular
cancer — it may also provide behavioral benefits.
The reduction
in the incidence of certain
cancers, as mentioned earlier, is even greater when the
dogs are spayed or
neutered before their first heat cycle.
A study on Golden Retrievers found that male
dogs who were neutered before 12 months of age had double the risk of hip dysplasia than their intact counterparts (Torres de la Riva G, Hart BL, Farver TB, Oberbauer AM, Messam LLM, et al. (2013) Neutering Dogs: Effects on Joint Disorders and Cancers in Golden Retriev
dogs who were
neutered before 12 months of age had double the risk of hip dysplasia than their intact counterparts (Torres de la Riva G, Hart BL, Farver TB, Oberbauer AM, Messam LLM, et al. (2013)
Neutering Dogs: Effects on Joint Disorders and Cancers in Golden Retriev
Dogs: Effects on Joint Disorders and
Cancers in Golden Retrievers)
That's due
in part to the fact that
neutering and spaying reduce (and
in some cases nearly eliminate) the potential for your
dog to develop certain types of
cancer, including testicular and cervical
cancers.
In the male,
neutering prevents testicular and prostate
cancer, and helps the
dog focus his attention on his human family rather than search for a mate or try to mark his territory.
For
cancers other than those three, the incidence of
cancers included
in the study were higher for
neutered than intact
dogs.
Neutering a male
dog similarly decreases the risk of testicular
cancer, although this is not a highly malignant form of
cancer in dogs.
A retrospective study of cardiac tumors
in dogs showed that there was a 5 times greater risk of hemangiosarcoma, one of the three most common
cancers in dogs,
in spayed bitches than intact bitches and a 2.4 times greater risk of hemangiosarcoma
in neutered dogs as compared to intact males.
Mast cell
cancer: 3.5 times higher incidence
in neutered male and female
dogs, independent of age at the time of
neutering.
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.
The AVMA policy statement goes on to say: ``... potential health problems associated with spaying and
neutering have also been identified, including an increased risk of prostatic
cancer in males; increased risks of bone
cancer and hip dysplasia
in large - breed
dogs associated with sterilization before maturity; and increased incidences of obesity, diabetes, urinary tract infections, urinary incontinence, and hypothyroidism.»
Neutering and the age at which a
dog is
neutered may affect the animal's risk for developing certain
cancers and joint diseases, according to a study published Feb. 13
in the online scientific journal PLOS ONE.
• 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 (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.
The costs of not spaying or
neutering your animal can wind up costing much more
in the long run if your pet has behavior issues (such as urine marking or destructiveness), or if your
dog winds up with
cancer.
Other types of
cancer: 5.0 times higher incidence
in neutered male and female
dogs.
Even so, the AVMA deals HSUS a blow
in its straightforward policy statement «potential health problems associated with spaying and
neutering have also been identified, including an increased risk of prostatic
cancer in males; increased risks of bone
cancer and hip dysplasia
in large - breed
dogs associated with sterilization before maturity; and increased incidences of obesity, diabetes, urinary tract infections, urinary incontinence, and hypothyroidism.»
A greater risk for
cancers associated with
neutering may reflect the (non-significant) tendency for
neutered dogs to be older when diagnosed and the greater longevity
in neutered dogs [11, 56, 57] as advancing age is associated with a greater prevalence of
cancers [24, 58].
Indeed, I was proven correct, at least
in large breed
dogs, where the odds of some types of
cancer increase with early spay /
neuter.
In an intact male it would be the testicular tumor (
neutering a male
dog will eliminate the
cancer risk).
Spayed and
neutered dogs suffer fewer
cancers and are
in general less aggressive.
Neuter (Orchidectomy) surgery
in young male cats and
dogs greatly reduces their risk for developing prostate disease and certain types of
cancers
Cats and
dogs who are spayed and
neutered have lower incidents of
cancer and tend to wander off less than those who are not (which can result
in injuries due to fights, car accidents, etc.).
Many factors are involved
in deciding when (or whether) to spay or
neuter dogs with a family history of
cancer, especially: Transitional Cell Carcinoma, Hemangiosarcoma, Osteosarcoma, Lymphosarcoma, or Prostatic Adenocarcinoma where the risk of
cancer in some breeds
in limited studies appears to be higher if the
dog is spayed or
neutered.
WRONG, current research shows
neutering leads to increased
cancer incidents
in dogs.
Breeders are still holding to the old tale of
neutering preventing many type of
cancer in dogs.
Masses are common and
in most cases are benign but if you find a new one of these, consult your vet to have it checked as
cancer is quite common
in dogs, particularly those who have not been spayed or
neutered early
in life.
Spaying before the first heat almost eliminates the chance of getting mammary
cancer and
neutering will prevent many bad habits which occur
in male
dogs like marking or roaming
in order to find females.
Testicular
cancer is rare
in both
dogs and cats, but if detected early,
neutering is usually curative, since most forms of testicular
cancer tend not to spread to other organs.
Ru et al. (Ep Sante Anim 1997 and Vet J 1998) first reported an increase
in the risk of the bone
cancer osteosarcoma
in neutered as compared to intact
dogs.
Certain
cancers, especially prostate and testicular
cancer, are much less prevalent
in neutered dogs.
Project Abstract: This study extends the investigator's recently completed AKC Canine Health Foundation - funded project studying 12
dog breeds to identify major differences
in the degree to which spay or
neuter may be related to an increase
in joint disorders (hip dysplasia; cranial cruciate ligament tear) and / or
cancers (lymphoma; hemangiosarcoma; and mast cell tumor).
Category: Important Questions to Ask You Vet, Medicine Decision Making, Speaking for Spot, Veterinary Specialists, Your
Dog's Best Health, dog health care, Dr. Nancy Kay, Nancy Kay DVM, Spay and Neuter Tags: Dr. Nancy Kay, Nancy Kay DVM, Speaking for Spot, Canine Cancer, hip dysplasia, Your Dog's Best Health, neutering, Zeuterin, cruciate ligament disease, Zeutering, surgical castration, chemical sterilization, neutering complications, testicular tumors in dogs, canine prostate gland disease, testosterone in d
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dog health care, Dr. Nancy Kay, Nancy Kay DVM, Spay and Neuter Tags: Dr. Nancy Kay, Nancy Kay DVM, Speaking for Spot, Canine Cancer, hip dysplasia, Your Dog's Best Health, neutering, Zeuterin, cruciate ligament disease, Zeutering, surgical castration, chemical sterilization, neutering complications, testicular tumors in dogs, canine prostate gland disease, testosterone in d
dog health care, Dr. Nancy Kay, Nancy Kay DVM, Spay and
Neuter Tags: Dr. Nancy Kay, Nancy Kay DVM, Speaking for Spot, Canine
Cancer, hip dysplasia, Your
Dog's Best Health, neutering, Zeuterin, cruciate ligament disease, Zeutering, surgical castration, chemical sterilization, neutering complications, testicular tumors in dogs, canine prostate gland disease, testosterone in d
Dog's Best Health,
neutering, Zeuterin, cruciate ligament disease, Zeutering, surgical castration, chemical sterilization,
neutering complications, testicular tumors
in dogs, canine prostate gland disease, testosterone
in dogs
Prostatic
cancers do occur
in the
dog, but are more common
in neutered dogs than
in non-
neutered dogs.
According to the American Veterinary Medical Association, spaying and
neutering pets offers many health benefits to pets including preventing uterine infections and breast
cancer in female
dogs and lessen the risk of enlarged prostate glands and testicular
cancer in male
dogs.
Prostate
cancer in dogs, as well as most of the other common prostate problems
in dogs all have one thing
in common - they can all be prevented or greatly reduced
in severity by having your male
dog neutered.
In addition to the reduction in reproductive cancers, there are a number of other beneficial health effects seen in dogs that are spayed and neutere
In addition to the reduction
in reproductive cancers, there are a number of other beneficial health effects seen in dogs that are spayed and neutere
in reproductive
cancers, there are a number of other beneficial health effects seen
in dogs that are spayed and neutere
in dogs that are spayed and
neutered.
Neutering eliminates the risk of testicular
cancer in male
dogs and cats.
Keep
in mind though that — according to veterinarians — not spaying or
neutering your canine can make your
dog more susceptible to health problems like
cancer in reproductive organs or pyometra.
Unlike testicular and breast
cancer, spaying or
neutering actually increases the risk of bone
cancer in dogs twofold, possibly because sterilization alters hormone levels.
While some uncontrolled studies linked
cancer and joint problems
in large
dogs to early spaying and
neutering, these are common issues
in larger
dogs and no studies have definitively linked the two.
Neutering also removes the risk of testicular
cancers and limits the development of prostate disease
in male
dogs.
A more recent publication from U.C. Davis (de la Riva, Hart et al, 2013) looked at two joint disorders and three
cancers — hip dysplasia, cranial cruciate ligament tear, lymphosarcoma, hemangiosarcoma and mast cell tumor — and showed that, for all five diseases analyzed, the disease rates were significantly higher
in both males and females that were
neutered either early or late compared with intact (non-
neutered)
dogs.
Neutering male and female
dogs at an early age is one way to dramatically reduce the chances of pets developing
cancer in later years.
The threat of uterine and testicular
cancers in dogs is real, and spaying /
neutering can help reduce the risk.
The striking effect of
neutering in female Golden Retrievers compared to male and female Labradors, and male Golden Retrievers, suggests that for this gender and breed the presence of gonadal hormones has a protective effect against
cancers over most years of the
dog's life.