First year beekeeper. added second brood box to both of my hives, but they seem to be haveing a hard time drawing them out. Im feeding 1:1 syrup to both hives. Im getting worried that they are filling lower boxes with the syrup and not leaving room for eggs/brood. My equipment is brand new, wooden frames with wax coated foundation. I do have older frames that i can use. They are partially drawn about 50-70%. But that comb seems very brittle. Question, what to do? Keep feeding syrup and use new frames? Or, stop feeding and switch out new frames for partially drawn ones?