Wuff

"Wuff, " said Loony politely, and went on scratching.

The Rat-A-Tat Mystery Blyton, Enid 1966

"Wuff," said Bingo, head on one side, listening carefully.

The Mystery of Banshee Towers Blyton, Enid, 1898?-1968 1961

"Wuff, " said Timmy, bounding into the little shop at once and putting his great paws up on the counter, much to the surprise of the woman behind it.

Five Go To Billycock Hill Blyton, Enid, 1898?-1968 1957

"Wuff, " said Timmy, who knew that word very well.

Five Go To Billycock Hill Blyton, Enid, 1898?-1968 1957

"Wuff, " said Timmy and lay down heavily on the map.

Five Go To Billycock Hill Blyton, Enid, 1898?-1968 1957

"Wuff, " began Jet, but Guy stopped him immediately.

Five On A Secret Trail Blyton, Enid, 1898?-1968 1956

"Wuff, " said Buster, wagging his tail most appreciatively.

The Mystery of the Strange Bundle Blyton, Enid, 1898?-1968 1952

"Wuff, " said Buster, thumping his tail approvingly.

The Mystery of the Strange Bundle Blyton, Enid, 1898?-1968 1952

Annywon member “A Crissmuss Story”, wen tehy would playe teh “Peter and teh Wuff” feem wheneveh teh neyborhood bully woud scare teh littel kids?

an nex I wants - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger? 2008

A prolonged string of barks, with moderate to long intervals between each one: These sounds are really in the form of “Wuff”—pause—“Wuff”—pause—“Wuff,” and so forth.

How to Speak Dog Stanley Coren 2000