I would place the cage on it's side on the top bars of the broodnest and watch. They might not actually ball it, but will act hostile to the queen. The bees will grab at the screen and try to sting. Pulling them off the cage is like tearing apart velcro. Queenless bees would be attracted to the cage too in equal numbers but act differently. They walk on the screen and can be moved with your finger. Many will Nassanov bringing in bees from all around in a parade.
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