Knucs, no i don't, but probably should? Our winters aren't as harsh as yours are. The weather has changed a lot in the past several years, back when i was growing up from the last week in Oct. to last of March it was cold winter time, nowaday it most times don't get real cold till Jan.? Then we have cold spells fpllowed by warm till middle of April which i think the bees fly on 50f and up days with nothing to gather, come back hungry and deplete there stores after several days or weeks of warm, cold, warm, cold, the workers die off and the nuc gets weak and the queen won't lay anymore eggs than the cluster can cover. So if i don't catch it quick enough and start feeding they will freeze or dwindle. JMO Jack