Drone brood everywhere
Just inspected my strongest hive, was my strongest anyway. Two weeks ago all seemed well. Lots of sealed brood, 2 frames of drone brood, lots of honey and pollen, didn't see queen but this is a three deep and intidatingly strong.
Now it's filled with drone brood everywhere. I didn't notice bullet brood but I may have just overlooked it.
So, what shall I do? Give a frame of eggs larvae? I will probably have a varroa problem soon.
Thanks for your help.
9th year beekeeper, about 20 hives.