When to spay?

[NYDDB]

I just saw this yesterday- interesting:

Bladder and Prostate Cancer: Neutering Male Dogs Increases Risk * Dog Cancer Blog

 

[zardac]

Snippets from an American Veterinary Medical Association opinion:

.Although spay/neuter is an important part of effective population control programs, and may benefit individual dogs and cats if performed at the appropriate time...

....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.

AVMA: Mandatory spay/neuter a bad idea