I film my bees almost every day. Yesterday I saw them drag out dozens of pupa. I googled this and never found a definitive answer as to why. Any thoughts? I picked all of them up and did not see varroa mites. In fact I've still never seen a mite in person. It did go down to 53 degrees the night before (which is strange for TN this time of year). Should I do a thorough inspection and look for disease? Here's the video.