The story of Don the talking dog

In 1912, Don the dog took American vaudeville by storm. A European immigrant, Don spoke German, or at least 8 words of it. He reportedly said things like kuchen (cake), hunger (same word in English and German), and his own name. A celebrity and media darling, Don went from the stage to starring in newspaper ads for Maltoid Milk-Bone dog treats. Over at Smithsonian, Greg Daugherty tells the whole story of this curious canine:

Off stage, Dons purported ability to talk was taken seriously even in academic circles. Lending some credence to the notion that a dog might actually converse, the inventor Alexander Graham Bell had once claimed that as a young man he taught his Skye terrier to say How are you grandmamma?

On a 1913 visit to San Francisco, Don and his handlers called on J. C. Merriam, a respected paleontologist at the University of California at Berkeley, who, if contemporary newspaper accounts are to be believed, was astonished and declared his belief that the dog can reason and think for himself.

Earlier, the respected journal Science had another explanation, based on statements by a University of Berlin professor who had also examined Don. His conclusion, the journal reported in May 1912, was that the speech of Don is to be regarded properly as the production of sounds which produce illusions in the hearer.

How the hell does he know though? Did he ask Don?