I can't tell you how many times I have been asked this very interesting question! So often, in order to prevent unwanted pregnancies, shelters and veterinary offices recommend having your dog or cat neutered at a very young age. I've heard it suggested as young as 8 weeks!? I can definitely understand the wonderful intentions behind it- to combat the overpopulation problem here in the US. As with anything, it definitely has it's pros and cons. Pro: Prevents unwanted preg