I am hugely depressed due to five dead-outs and very anxious about my remaining three hives. The fault is all mine, I'm sure, due to pre-winter manipulations in response to "oops, they didn't fill the bottom deep". The dead-outs were heavy with filled frames of capped honey. The three remaining hives are also heavy but the bees are at the top. They are eating fondant off the top bars right now. My question: is there any reason not to add a deep of capped honey above each hive? Highs are in the 30's if that matters.