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This article contains plot details from one or more of the books.
Whispering rocks are a type of stone planted on the ground. If a wolf presses their ear against one and scratches it, there will be scratching sounds, vibrations and hisses. It will feel as if the rock and earth is whispering and sending a message or replying to the wolf.
HistoryFaolan, Edme, Mhairie and Dearlea are out to search for any living gnaw wolves in the famine, and upon finding Tearlach's dead body, the wolves grieve. They notice that Tearlach had his face to the ground, but not in a way of submission. Dearlea suggests he was listening for something.
Whistler uses a Whispering rock to find out if Faolan and the others are alright after the quake, in the Cave Before Time.