It's definitely not a documentary for the faint of heart - especially the dog lovers. It's also not focusing that much on the actual dogs - showing stories of warriors and their canines, often injured in battle.
The strongest voice here is the one telling a heartbreaking story of how the dogs are used for their unique ability to be trained to attack some and be faithful to their owners, essentially fighting battles they never chose to fight - getting injured or dead in the process. Everyone who's against war even in the slightest will resent that deeply, and perhaps rightfully so. It doesn't really help how the surviving dogs are called heroes, put on the covers of magazines, and celebrated. I'm not a dog, but I doubt it means anything to them - an ability to walk, to be healthy physically and mentally would probably mean a lot more.
It also shows the emotional/intelligence of the soldiers themselves - you can hear on of them saying how watching "Grey's Anatomy" was one of the favorite things of his dog, and when they took it off the air, it "almost killed her". No, Trent. It was the war that almost killed her. You know, the war us, humans decided to fight and took the loyal friends along for the ride.
