Welcome to the forum. I did read your other post, I have had bees for a year, not sure about your bees. I would check to see if you have a queen, if not get one or replace one if there. But then it is getting late in the season, but wouldn't think brood would be that little, just my opinion. As said I'm new also and am several miles south of you. Maybe someone with more experience will be able to help. Good luck to you and your bees, Heathnheaven.