Sounds like you have 6 frames of bees with only enough bees to cover 2 frames. If the 2 frames of brood are about to hatch out they have a chance. If there are 4 more frames of drawn comb in this hive, I would replace them with foundation less frames. If you have a good flow on, they have an even better chance. If you have a dearth, I would reduce the entrance even further to the smallest opening.
Jim Altmiller