Whenever Salty is contentedly sitting at her favorite spot, something odd happens: She reveals her pronounced front teeth and her jaw starts to chatter. This behavior can draw curious, even concerned, stares from her fellow café patrons.
“Some people think the shaking is because she’s sick, scared or cold,” Percival said, “but she is definitely healthy, happy and warm in the Melbourne summer!”
Chattering (chittering or knitting) is one trait that makes greyhounds special. Unlike humans, where teeth chattering is an involuntary form of shivering, greyhound teeth chattering is usually a sign of happiness or contentment, similar to a cat’s purr.