As Brutii I used my wardogs as part of an small-3 unit- size army
The army was made with :
a unit of roman cavalry
a unit of some infantry
and a unit of wardogs

I had about 3 or 4 of these tiny armies and they moved across gaul
to clean the land from small rebel forces or some warband units.
Wardogs are perfect for these tasks because no dogs are lost and at the beginning of every battle all dogs are alive again.

Ofcourse these ''squads'' were no match for huge armies so I withdrew them when a larger army attacked, but they were successful enough to use them again against the germans.