"I don't know if I'd call them pets, exactly," Thor hedges. Familiar isn't quite the right word either, he doesn't think. "But that's... close enough, I guess."

As to where he found them, that seems difficult enough to explain to those who know him already, so he glosses past that part.

"They're Asgardian ravens. My father had a pair just like them." Perhaps identical, though he's still not entirely certain.