My favorite is the Capybara
http://www.rebsig.com/capybara/capy7.jpg
It is a a tailless largely aquatic So. American rodent (Hydrochaerus hydrochaeris) often exceeding four feet (1.2 meters) in length.
There was a discussion of mice and rats getting into your house. How would you like one of these around? In another source I read at one time that they can reach up to 300lbs. Now that's a BIG rat!
When I was in highschool I actually named my parakeet Capyboppy (Capy for short) for the Capybara.
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"Always learn the rules so that you can break them properly." Dalai Lama
My Karma just ran over your Dogma.