paddymac, "The Dogs' Meeting" is to the tune of "The Chandler's Wife" and also the hit song of the 50s, "The Thing". It uses the same "Knock, knock, knock" idea. I think it's in here somewhere. If not I know the words as they were collected in Australia. It doesn't change much.
I'm on a roll. Might as well post the words: Last lines are repeated.

THE DOGS' MEETING

The dogs once held a meeting, they came from near and far
Some they came by aeroplane and some by motor car
Before into the concert hall they were allowed to look
Each dog had to take his (Knock, knock, knock) and hang it on a hook.

Well hardly were they seated there, each father, son and sire
When a dirty little yeller dog began to holler "Fire!"
Out they rushed in panic, they didn't stop to look
Each dog he grabbed a (Knock, knock, knock) from off the nearest hook

And that's the reason why, my friends, when walking down the street
Each dog will stop and swap a smell with every dog he meets
And that's the reason why a dog will leave a good fat bone
To go and smell a (Knock, knock, knock) in hopes to find his own.

Sings well doesn't it. Cheers, Joy