Any odor from the hive? There will be cases where a bee tries and fails to hatch due to temperature, if these larva date back to before the hive abandoned the lower box, they may have gotten too cold. There are diseases of brood however.
No odor. And there are very few unhatched brood. The surviving bees seem active and healthyAny odor from the hive? There will be cases where a bee tries and fails to hatch due to temperature, if these larva date back to before the hive abandoned the lower box, they may have gotten too cold. There are diseases of brood however.
Thanks.maybe slightly defective brood or a temperature shift before they could hatch, I wouldn't be concerned