Wardogs are exceedingly good at killing unarmored units such as warbands. They are also highly effective at holding up enemy units and giving you room to maneauver. One final use for them is as a cavalry sponge. If you have a unit or two of wardogs that have not been released and you find yourself being charged by enemy cavalry, loose the dogs straight into the charge. Even heavy cavalry such as the Noble Cavalry of the Gauls will come to a screeching hault moments after the dogs reach them. For some reason, dogs simply do not seem to take the huge charge hit that other units do. Then you just have to charge in your infantry and cut down the vulnerable riders.