> I don't think worker or drone brood will be damaged unless it is
fierce shaking.
Beekeepers often strike the end of a frame top bar on a lid or a
doorstep to dislodge stubborn bees. It works well, but gives a real
jolt that is much more forceful than shaking by hand. That is why we do
it when bees are clinging and shaking does not work.
Experienced beekeepers often do a "quivering shake" which works well and
is easier on the beekeeper and maybe the brood.
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