We have had our first really warm weather this past week and the maple trees are startng to bloom so I decided to check my bees. I have been watchign the hives and there has been moderate activity. Appearently it has been moderate robbing because when I checked the hives today one hive had no bees at all and the comb was empty except or a few stores in the upper super. My second hive had a small cluster of bees that took up about a soft ball size ball around 4 frames but every bee was dead in place. There was what appeared to be a small amount of mold under the bees so it appeared they had been dead for a little while. There were some pollen stores still in this hive but very little honey stores. I also found that an aspen strip had been left in the hive over the winter and wonder if this could have killed the hive or if there may be some other aspect that killed it. Second since all my bees are gone or dead I will be looking for some nucs or packages soon but should I use these same hives and comb since it is in great shape and has pollen already available to not?