The dogs were frustrated with their lot in life, so they sent ambassadors to Zeus with a petition.
But when the dogs beheld the god, they were terrified and pooped all over the halls of Olympus.
"That smells really bad!" shouted Zeus.
The dogs sent more ambassadors, and this time they stuffed perfume into their ambassadors' behinds.
When Zeus appeared, these dogs also pooped, and the mix of poop and perfume smelled even worse.
Zeus expelled the ambassadors from Olympus.
Even now the dogs are still looking for their lost ambassadors; that's why you see them sniffing each other's behinds.
Inspired by: Mille Fabulae et Una, a collection of Latin fables that I've edited, free to read online. I am not translating the Latin here; instead, I am just telling a 100-word version of the fable.
Notes: This is fable 771 in the book, which is Perry 517.