I only made my dolphin blaster (TM) topic because I saw this one on dolphins...
Oh, and the US wanted to use bats as "Batbombs" against the Japanese...
Wiki never lies:
http://en.wikipedia.org/wiki/Bat_bomb
Yeah, and the dog thing, they were trained by putting food under tanks. The problem was that there was no clear distinction between the enemy and russian tanks, so there was a good chance they might run under a friendly tank as much as they might run under the enemy tank.
Also
Wikipedia wrote:The German army learned of the use of Hundeminen as anti-tank weapons, and on the Eastern Front dogs were shot on sight, under the pretence that they were likely to be rabid. Dogs became scarce as a result, making the use of dogs as a surprise weapon even more improbable.
Fun Fact: Hunde= Dog (hound is the cognate of Hunde) and Minen= (obviously another cognate for Mine) explosion...Therefore Hundeminen= Dog Explosion