> > * Or if the cat is male, and as they often do, he pee
> > around the house to mark his territory.
>
> *female cats will do that as well, but they don't smell as bad
> as unneutered males.
>

FYI, some neutered males do their fair share of territorial "marking,"
both inside and out, regardless of when they were neutered or whether
they have been inside all the time or not.

N.