I'm completely against it. Just because we humans are dumb enough to start wars doesn't mean we have the right to drag animals into it.

Aside from the animals already mentioned in this thread chickens and pigeons are also used, to detect the presence of biological and chemical weapons.

A scary fact: 5000 dogs were used by USA's troops in Vietnam, but only 140 came home. Not because the rest were all killed, but because they were abandoned.

Even if we didn't have modern technology to replace these innocent animals with I'd still be against it.