
I personally don't believe there have been enough studies done to prove that no harm is done. Some bitches are fine for the rest of their lives, but others certainly have longterm problems that
seem to be a side-effect of early spaying. My
personal view is that an animal should be physically mature before it is neutered, but others may well disagree. In fact, unless I had an entire male in the house as well, I probably wouldn't spay at all, because I've never found seasons to be that much of a nuisance.
:)