My Spoo would make pig snort noises when she would swim. It was a riot to hear her. I would laugh and say, "Your not a pig your a Poodle!" but that didn't stop her. :flypig: The happier she was swimming the louder she would get.
Gorky is very extroverted with his sounds. He snorts when he goes down to a command, greets new people etc. I know you are not supposed to laugh when training but he is hilarious and I have to do a silent snicker.
My two grunt when they get their cheeks or ears rubbed. I think that could be the same sound you are talking about. They just love to have the cheeks rubbed. They stick their noses way up in the air and close their eyes. I love it.
Underpants Gnome, That's a riot! I call Chagall "The Snuff-a-luck-a-kiss" because he makes that snuffling sound when he drinks. And to think he's only drinking water when he does it, what would vodka make him do?? lol (kidding people, only kidding--he's way too young to drink!)