I've got a problem that I hope somebody can help me with. Last year was the first year of Beekeeping, and I had three hives. One was very healthy going into winter, one was so-so, and one was weak. I finally got out to check on them recently, and all the bees were dead. Piled up outside the hives and inside. The combs are discolored, brownish, and there are signs of mice (droppings). There is still capped honey in some frames, but no sign of brood. They're in a location that's difficult to check in the winter, but protected from the wind and with alot of sunshine. We had a lot of snow and cold this year. Also, it warmed up the end of March and then 16" of snow beginning of April. Any help on the culprit? Also, are the combs still usable or should I start from scratch? I found some full frame nucs available locally, so this year might still be salvagable.