I am surprised you haven't found anything listing the pros and cons of pediatric spay/neuter. What does your breeder say?
There are several studies that show a correlation between pediatric spay/neuter with an increase in cancers, an increase in joint related issues (both hip and elbow dysplacia) and some behavioral issues.
Unfortunately, I just got a new computer and don't have all the bookmarked pages that I once had. I do have this link - you will need to download onto Adobe Reader the link at the bottom of the page.
http://sites.google.com/site/goodpup...rhealtheffects
Here are the pros and cons from that link.
Quote:
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
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