I have a hive that is queen-less with a laying worker. The hive is weak and shows signs of SHB larvae. How wise is it to unite that to a healthy hive? and what if that healthy hive is Russian and the weak Italian or NWC? Is there a way to save the hive this early in the season (first week of March) when there are no drones and thus no new queens available for a few weeks? The Russian hive is very healthy through and through, I'd hate to affect it negatively by putting a sick hive on top.