Re: PreSwarm Symptoms?
If you box a swarm on Friday into a cardboard box (is what I'm thinking you mean) then by Monday they will have wild comb drawn inside the cardboard box. Yes, do give them an opening, and no don't give a feeder yet. On Monday, you'll need to carefully open the cardboard box and dump the bees into the hive box. In the hive box, remove a frame or two before dumping in the bees. Then cut the wild comb drawn, if there is enough to warrant doing so, and tie it into the frame you have removed from the box and then put it into the beehive box. Now put a feeder on if there is no flow, and you have a hive. Good luck!
20+ years, raise my own queens, feed when needed, I treat but have not perfected varroa management yet.