I'm brand new to beekeeping, having lots of fun but worried at the same time. I inspected the lower frames of my two hives today, and one of them has some interesting cells. I noticed a foul smell (not too bad, but if I put my nose up to the frame it is noticeable). Some of the brood looks sunken in, some is spotty, I noticed some slimy black cells, and to be honest I can't tell if some of the cells are dried brood or pollen. Would appreciate some feedback on the pictures. Thanks in advance!