I don't know if I'm the first one to have noticed, but...
in the episode [4F19] Homer's Enemy when Burns made a dog vice president, that reminds me of something...
The Roman emperor Caligula made a horse a senator. The reason for this act was to mock and "emsmallen" (opposite of embiggen) the function of the Senat in the Empery at that time.
Think about it.
Bojan.