The M26 and X26 CEWs can be an effective option for dealing with aggressive animals and have generally been successful in most deployments. The X2 CEW uses similar technology, but does not yet have the same service record as the previous models.
Note: If a probe deployment completed circuit is initiated and maintained, the aggressive animals are usually incapacitated/stunned momentarily in M26 and X26 deployments, but recover quickly. The vast majority of the animals quickly left the scene and broke the wires.
If deployed on a domestic animal, consider having animal control available to restrain the animal.