Sorry, my friend. I didn't mean to confuse you, of course, but I'm not quite sure where your confusion is.
To put it simply, it's much more common to hear whose used with people, animals, or things, so use it.
Here are more examples to show you what I mean:
with people: That's the couple whose daughter won a medal in the army.
with animals: He's the guy whose dog gave birth to a litter of twelve!
with things: I've never had a car whose engine runs on ethenol.
I hope you're not confused anymore, Gilbert.