The dog cage houses four war dogs that are let loose once a sufficient enemy force approaches them, attacking them without relent. Dogs are frail, but potent in melee combat. Once the threat is dealt with, the dogs return to their cage. Dogs do not harm friendlies. When all dogs are killed, the cage is removed.
The cage trigger is based on the default aggressive stance trigger, i.e. the dogs will not attack when only a handful of lesser troops arrive, making a defenseless cage vulnerable to attacks.
There is a maximum limit of ten dog cages.