Snakes

[Dog]

This footage is quite old, but you can actually hear the snake breathe and growl at the camera.

 

http://poststuff4.entensity.net/031309/flash.php?media=snake.flv

[bungle]

It just goes to show you can't be too careful.

[bridge too far]

How about this:

 

http://www.telegraph.co.uk/earth/wildlife/4999856/Python-eats-pet-dog.html