Okay so my husband and I are new to Beekeeping, he has went a bit overboard with it considering he said we would start with 3 hives and now have 21 hives many given to us or splits were made, but my question is we decided to try the ventilated bottom boards with trays and someone said to put oil in bottom of tray and it would help keep down SHB, but we have a lot of dead bees everytime I go to empty out the tray, can someone tell me if this is normal. I don't understand why they go through the screen. Any help would be appreciated.
Regina in TN