Two of my hives will not be built up enough I think to overwinter. One hive has 6-7 full frames of bees, brood, honey, etc and the other hive is a full 8 frame deep. Both queens are new this summer and seem to be doing well. I hate to have to kill one of the queens, but I dont think I have a choice. Is it too late here in northeast Ohio to do a combine? Or has anyone had success overwintering a single 8 frame deep? I could also stack these between two very strong 2 deep hives. Any suggestions? These are Carniolan/mutts.