Thanks Mindy and Dave! The day after the installation, the ground was littered with hundreds of dead bees in front of each box. I don't know if they were robbers trying to get into the box or the box bees dying. The hives seem to be doing okay these past two days though not as many are outside of the box trying to get in! Hope that means they have found a lot of nectar sources and are not all dead. Going in today to put syrup in the tops, then will pull them apart tomorrow to make sure the queens are out.