Brewer's: Flutter the Dovecotes
(To). To disturb the equanimity of a society. The phrase occurs in Coriolanus.
“The important movement in favour of a general school of law fluttered the dovecotes of the Inns of Court.” —Nineteenth Century (Nov. 1892 p. 779).
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894