What on EARTH could they be talking bout?

PICTURE OF THE WEEK.
Couldn't figure out a caption for this one. No clue what they could be talking about.
She is 15. He is 4.
I like to think they are discussing the importance of hand and face cleanliness at dinner?
Most likely he growled at her, this is his preferred way of communicating, and she in turn is maybe baring her teeth or flaring nostrils to let him know that Yes, I heard you, and No, I will not do as you say, also I AM BIGGER than you and will eat you for dessert.
Or they are just seeing who can make a funnier face?