The dog shakes his head in amazement

 

“With all the animals who live in cages, and performers who live in caravans?” says the dog.

“Of course,” the barman replies.

“And the tent has canvas sides and a big canvas roof with a hole in the middle?” persists the dog.

“That’s right!” says the barman.

The dog shakes his head in amazement and says “why in the world would they want a plasterer??