Daddy?

I took DJ in to our bedroom to wake up sleeping Daddy yesterday. After a few wiggles and squirms and squeals of delight, DJ turned to Steve and said, "Dad---y." He swallowed the second syllable, but holy cow did it sound like "Daddy". We both looked at each other wide eyed; it was clear we'd heard the same thing. Steve said then that when he said "doggy", it sounded very similar to that. He got "dog--y" out but swallowed the second syllable. We haven't heard either word since, though. :-(