I certainly recall reading something on the subject of using dog scouts......but i cant remember anything stating that they were used in battle situations, as they are too unpredictable and after a few incidences of them turning on their own side, they dropped the use of them in battle situations.
Plus in the defence of computer games, the developers try and research the subject as fully as they can, obviously it is not to be taken as 100% truthful or to be trusted fully, but parts of those such games have some true aspects to them......