Do they make feline paternity tests?

Peanut:  Hey Mom!  I have something very surprising and exciting to tell you.
Me:  Ooh, what?
Peanut:  T's cat had three kittens.
Me:  Oh, wow.  They didn't know the cat was going to have kittens?
Peanut:  Nope.  They were just sitting on the couch one night watching TV and their cat started having kittens.
Me:  Oh my.  That really is a surprise then, isn't it?
Peanut:  Yep.  But, I just know that my guinea pig will never have babies.
Me:  No.  Your guinea pig will never have babies.
Peanut:  But she might.
Me:  Um, do we have a boy guinea pig?
Peanut:  No.
Me:  Then how would your guinea pig have babies?
Peanut:  I dunno.  She just might.
Me:  Peanut, didn't we talk about where babies come from?
Peanut:  I dunno.
Me:  We did.  Do you remember, it takes a boy and a girl together to make babies?  We only have a girl guinea pig.  No boy.  No babies.
Peanut:  Oh yeah.  Wait, then how did T's cat have kittens?
Me:  T's cat met a boy cat outside.
Peanut:  Who?
Me:  I have no idea.
Peanut:  I bet it was Slinky.
Me:  Probably.
Peanut:  Figures.