Neutering/Spaying: What age?

[lizbud]

Smokey and Buddy at 6 mos. Maggie spayed at 5 1/2 mos. All the kitties,
within a few weeks of getting each of them.

[AllAmericanPUP]

Maggie was spayed when she was 8 years old and lived to be 14 almost 15

Shadow and Keesha were spayed at 6 months
Eli and Ozzy were neutered around 7-8 months
Sheeba was spayed around 15 months because i thought she was already spayed but she just was really late coming into heat and didnt have her first heat(that i knew of anyways) until she was 15 months old

[sumbirdy]

Tiny-3 years
Sprinkles-8 years
Lacy-7 or 8 years
Minnie-5 months
Triskit-1 year
Daphney-2 years

The males (excluding Tiny) have not be neutered yet. I'm trying to convice mom but she doesn't think it's necessary because "they can't have puppies"