We'd been playing for awhile up to this point; notice him panting at the end.
Unfortunately, his growling - whilst in possession of the toy in his mouth - didn't come through. He only growls when he has this toy or manages to nab a sponge.
http://s477.photobucket.com/albums/rr131/keycube/?action=view¤t=oliver_playing.flv
http://s477.photobucket.com/albums/rr131/keycube/?action=view¤t=oliver_playing.flv