Reply #20: Nope, you can and should do it by 3 or 4 months.

[friesianrider]

I volunteer at a rescue, and our vets always do it at 3 or 4 months, 6 months is really pretty late nowadays. Research has shown that the earlier an animal is spayed or neutered, the faster they recover. Plus, by 6 months, both genders are already plenty capable of reproduction, and of course the idea is to get them done before that sets in ;) Plus, especially with the males, if you do it closer to 3 or 4 months, there is less chance of them learning how to "spray" (which definitely sucks, as any kitty owner can tell you! )