Vietnam pictures of K9 men. The dogs, mostly German shepards, had one of the most dangerous jobs in combat_ranging ahead of a patrol deep in enemy territory, usually at night. Some dogs served as many as five combat tours. They were so effective that the Vietcong offered a $20,000 bounty for their capture_twice as much as the reward paid for a GI, according to war-dog histories. An estimated 500 dogs died in combat in Vietnam. Other succumbed to illness, parasites or tropical heat. Barely 200 were brought to the United States out of 400 dogs used.