It's not just a grunt: Pigs really do have something to say - The grunts made by pigs vary depending on the pig's personality and can convey important information about the welfare of this highly social species, new research has found.

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It's not just a grunt: Pigs really do have something to say - The grunts made by pigs vary depending on the pig's personality and can convey important information about the welfare of this highly social species, new research has found.