Dogs of war

Rex is a genetically engineered Bioform, a deadly weapon in a dirty war. He has the intelligence to carry out his orders and feedback implants to reward him when he does. All he wants to be is a Good Dog. And to do that he must do exactly what Master says and Master says he's got to kill a lot of enemies. But who, exactly, are the enemies? What happens when Master is tried as a war criminal? What rights does the Geneva Convention grant weapons? Do Rex and his fellow Bioforms even have a right to exist? And what happens when Rex slips his leash?