No.
if not spayed and neutered the girl is friendlier if they are spayed and neutered they are equally friendly.
cause its a girl or has been neutered.
There is no such thing as a "neutered cow." You can get a neutered bull, which is called a steer, or a spayed heifer, but never a "neutered cow."
If they're spayed / neutered, yes.
Yes, definately.
They don't need to be neutered
You should go with a girl, if you have both, then both.
First of all female cats aren't neutered they are spayed. The tom probably isn't neutered and all he smells are the two female cats inside.
A neutered cat is male so he cannot have kittens. If he's neutered, he cannot father kittens either.
When dogs are spayed, the uterus is removed. Therefore, any embryos would go with it.
Only if they actually mate, and both have not been spayed or neutered.
No, a mare can not be castrated (neutered). The stallion however can be, and after castration they are called "Geldings".