Heroic Animals. 100 Amazing Creatures Great and Small

Bobbie the Wonder dog crossed more than 2,500 miles of plains, desert and mountains to find his way home - and became the inspiration for Lassie.
Cher Ami the pigeon, despite being shot twice, delivered a message that saved the lives of 194 soldiers in 1918.
Trakr the police dog spent two days exhaustively searching Ground Zero and found the last survivor of the 9/11 attacks.
Ever since Alexander the Great named a city after the horse who saved his life in battle (and another after his dog),