I have one double deep 10 frame hive in my backyard that was started from a nuc in late April. It is sitting on a freeman trap BB and I removed my screened top cover and replaced it with the standard inner yesterday. I also added my first entrance feeder yesterday and also moved my hive over about two feet. I reduced the entrance by about a third. At noon today they were going like crazy. I hoped it was just reorientation but noticed four dead bees on the ground at the base. Never had dead bees at the base so I decided it was robbing and threw a wet sheet over it. I have to go to work in the morning so anything I can do will have to bee late tonight or early in the morning. When do I take the sheet off and do I do anything else other than remove the entrance feeder? Thank you for any advice!