Well, I think the answer to the question of their poor weight is simply that they aren't weaned yet! This morning, their kibble and wet food slurry had both been nibbled at, but the bowl of KMR was polished clean! I poured another bowl and Essie and Pancake dove straight in! (Grape wanted lap time more than food!) Hooray! I'll weigh them when I get home so I can start to make sure they are gaining.