Carol/Carman,
refer to yesterday's topic "wu cha", I recommend that you try to feed HimHim/Elise with "wu Cha" first, and if you find them can finished a whole bowl of "wu cha", then you can start feeding congee.
For Wing Wing, he only had wu cha for 1 week and then change to congee, so I had not buy any wu cha for him and only used sample send by the manufacturer.