In act 2, scene 4 of Shakespeare's Macbeth, his horses break out of their stalls and eat each other.
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Prince: Ah, Blackadder. It has been a wild afternoon full of strange omens. I dreamt that a large eagle circled the room three times and then got into bed with me and took all the blankets - and then I saw that it wasn't an eagle at all but a large black snake. Also Duncan's horses did turn and eat each other - as usual. Good portents for your duel, do you think?
BBC. Blackadder, season 3: Duel and Duality
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Rosse: And Duncan’s horses (a thing most strange and certain),
Beauteous and swift, the minions of their race,
Turn’d wild in nature, broke their stalls, flung out,