spaying makes sense for not only your cats heath, it possibly might help ease her into communal living! Spaying like others have said helps reduce the unwanted cats, kittens, puppies and dogs from dying alone and unloved.
10 cats is a lot! How many catboxes do you have?
Believe it or not cats can be altered as young as 8 weeks old! Yes 8 WEEKS! The shelter I volunteer with sends animals home spayed or neutered. It's a great place!

Any way good luck with your kitty colony Wayne, peace & harmony

"We must become the change we want to see in the world"