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When a wolf descends upon your flocks, all you gain by killing him is a short respite, for other wolves will come,” King Garth IX said famously. “If instead you feed the wolf and tame him and turn his pups into your guard dogs, they will protect the flocks when the pack comes ravening.” King
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George R.R. Martin (The World of Ice & Fire: The Untold History of Westeros and the Game of Thrones (A Song of Ice and Fire))