We chain them, use them for experiments, eat them in some countries and make them wear funny sweaters in others. But we also use them to fight our wars and intimidate our detainees.
The most famous example of military dogs is the Vietnam dogs who faithfully served American soldiers and then were abandoned to unknown fates after we left the country. But the grand tradition continues in Iraq and Afghanistan...
I don't like it. If humans insist on wars and invasions, we should keep them to ourselves and leave other species out of it.
Even better if we didn't insist on such activities in the first place.