Pet Urban Legends

There is an urban legend in all facets of life, even in the pet world.

Check out these stories I found:

The Choking Doberman:
http://urbanlegends.about.com/od/dogs/a/chokingdoberman.htm

Daisy, the Canine Hero of 9/11:
http://urbanlegends.about.com/library/bl_not_all_heroes.htm

Dogs, Puppies, Cats Used as Shark Bait:
http://urbanlegends.about.com/library/bl_dogs_shark_bait.htm

Is a Dog's Mouth Cleaner than a Human's?
http://urbanlegends.about.com/od/dogs/a/dog_breath.htm

What urban legends have you heard of?