Here's a question I haven't seen addressed. My bees seem to be doing well, as their humming is audible when I place my ear to the hive. But I haven't seen any evidence that they've taken any cleansing flights all winter. Yeah, it's been cold here in southern Maine, but how long can they hold it before they have to poop? The bottom board is clean so they aren't going inside the hive. But no yellow snow whatsoever. My belly hurts just thinking about it. Any ideas? Thanks!