The day after the March 13th post, I put an additional box of honey comb on top of hives 2,3,4 and 5. I know it may be too early for such, but better that than late.
The splits seem to be doing OK. Number 5, has the most activity with bees moving in and out on a regular basis. Number 6 is less active, in fact I thought it had failed completely (ie all the bees had left), but when I popped the top on it today, there were bees roaming around. It still may be too weak to make it, but for now, I'll leave it alone and see what happens.