I downloaded the track and found an introductory verse that Richard was referring to:

If a little dog is sad
He'll whine and wail
When a little dog is glad
He'll wag his tail
All the Pekingese and Poms
Wave their little to's and from's
But one animal I know
Has no tail to wag, and so,

How can a guinea pig show he's pleased
When he hasn't got a tail to wag?
All other animals, you will find,
Have got a little tail stuck on behind.
If they’d only put a tail on a guinea pig,
And finish off a decent job,
Then the price of a guinea pig would go right up
From a guinea up to thirty bob.

The chorus is then played on the piano in ragtime, sung again in an upbeat style and then played once more by a jazz band, perhaps reflecting Melville Gideon's "…. wider musical interests and accomplishments"

DC