I want to see if I’ve got something to worry about. I’m pretty new to beekeeping and have a new package as of early April. Our queen was initially very productive filling one brood box (8-frame medium) and I added a second brood box which was going well. Now the laying pattern isn’t as strong (partially filled frames with gaps) and I’m finding black spots in the center of the C-shaped larvae. I pulled a few out with tweezers and the ends are black. I’ve attached some pics. Help! BTW, nothing on the bottom board, the larvae aren’t hard and chalky. Less than 10 SHB. Thx!!