[thecodont]

When the owner came to pick them up and the food, the older pup was sitting on my porch with his back to me. I started rubbing behind his right ear and he let out a groan that went on for about seven seconds. My neighbors eyes got about as wide as quarters and he said he never had done that before.

He does it all the time when I scratch/rub him. Course, I’ve been a dog person my whole life!!

I knew a German Shepherd that would attempt to purr (if you could imagine a dog trying to purr) when I pet her. She would emit a soft, prolonged, groaning sigh, and lean against my leg.

[djf]

I totally believe it. Dogs have many vocalizations that most people never hear.