Does Little Missy Foo Foo need a friend

We've had two female dogs, then three females, all toy breed size and "fixed" since they were puppies. We haven't had any gender conflicts between them, but if we had, we would've handled it. I don't think you can generalize like that. We've lost the older two in recent years and now just have our min pin. She seems fine with being an only "child" but we sure do miss the others.