I think that pet ownership has come a long way. When I was a kid, the dog was pretty much an ornament in the back yard. New puppies were exciting and people would take them to the vet and get them shots. But as that excitement wore off, the next time they saw the vet would be when they were 13 or 14 years old and at death's door. I think at that time, vet schools were pushing vets to get the speuter in before the honeymoon period was over, and thus maximize their profits while preventing each of those dogs from reproducing themselves many times over.
Nowadays, though, it seems that even average pet owners are hanging out at vet clinics a lot moreso than in the old days. I really don't think that there is the concern that people will never neuter or spay if they wait. It is true that dogs can reproduce before they are fully mature, mentally or physically, so there is that. But I don't think vet clinics stand to lose that much by encouraging customers to wait until a critter is 12 months, 18 months, or even 2 years old.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.