Dogs, Dolphins Help Protect U.S. Troops By SIOBHAN McDONOUGH .c The Associated Press WASHINGTON (AP) - This materiel not only has bite, it's got plenty of bark. And beaks and bottle noses, and feathers and flippers. Chickens, dogs and dolphins have been given their marching orders to help protect U.S. troops in Iraq. Chickens defy death in cages atop U.S. military Humvees to detect a possible Iraqi chemical attack. Well, some don't exactly defy death. Most expired after a short stint in the Iraqi desert - flu is suspected - and pigeons have taken their place. Dogs, long used in...