Recently found one of our hives empty .. no more than a cup full of dead bees on the bottom board, plenty of capped honey and a mouse nest burrowed into two frames on the outside wall. No mouse corpse and the entrance was covered with a guard which I put on once the weather began to get chilly here in Rhode Island. The only time I took the guard off since then was about a month ago to treat with OA , on and off fairly quickly. So, is it possible that a mouse would move in to a healthy active hive ( before I attached the guard ) and have driven the bees away ? I didn’t notice a lack of activity when I treated but it was a cold wet day and I expected the bees to be quiet and there was a couple of flyers during the process. Very perplexing ! I’m also assuming that I can’t extract the remaining honey for human consumption as it was in the hive during the OA treatment, but that I could feed it back to the bees in the spring. If anyone has any thoughts on this situation I’d love to hear them .. thanks.