Shakespeare's line got me wondering what dogs the Romans used in war. In the book, "American colonies," by Alan Taylor, he mentions that the Spanish used mastiffs against the indigenous people in the Americas, but I've not seen any reference to Roman war dogs. Did the Spanish use Italian dogs? Annnnd, where'd the name, "mastiff" come from? (Proofreader daffynition: If your mother sees a 70Kg dog charging her it'll scare ma stiff) But what's the real one?
From the Wikipedia article on military animals: "Dogs were used by the ancient Greeks for war purposes, and they were undoubtedly used much earlier in history. During their conquest of Latin America, Spanish conquistadors used Mastiffs to kill warriors in the Caribbean, Mexico and Peru. Mastiffs, as well as Great Danes, were used in England during the Middle Ages..." This corroborates the assertion in the book I mentioned in the first post.
And how about the pigs of war? In the same military animal Wiki: "Pliny the Elder wrote about the use of war pigs against elephants. As he relates it, elephants became scared by the squeal of a pig and would panic, bringing disaster to any soldiers who stood in their path of flight." Cry "Bacon," and let slip the pigs of war!"