Swarm taken last night, happy this morning applied feed in the form of syrup, thanks G. I have read that this is an ideal time to treat with oxalic acid to cause drop down of any varroa mites on the bees before the mites enter the soon-to-be-laid brood - the only place the mites can breed. I wonder if this treatment at this time would in fact stress the colony and even persuade them to move on again. Does anyone have any experience of this or opinion?