Snickerdoodle will often sit on my back and "talk" happily My father, who is up all night because of his job, (he stays in the living room near the chinchilla) tells me that when he leaves the room at night, Snix barks as if to say "come back and play with me".
We also chirp at the chinchilla, and he knows what we're doing (obvious by his shocked look), but he doesn't talk back.