> But they had carried their luxury to such a pitch that they had taught even their horses to dance at their feasts to the music of the flute. Accordingly the people of Crotona, knowing this, and being at war with them, as Aristotle relates in his History of the Constitution of Sybaris, played before their horses the air to which they were accustomed to dance; for the people of Crotona also had fluteplayers in military uniform. And as soon as the horses heard them playing on the flute, they not only began to dance, but ran over to the army of the Crotonians, carrying their riders with them.

-- Athenaeus, The Deipnosophists

The Aristotlean source he cites is lost.