Hello Naira landers, I've read alot of articles on this blog about how to make a dog to be aggressive and non seems to be working.
Now from a professional point of view of how to make ur dormant or non barking dog to be aggressive:
Step one: isolation this means DAT u should keep d dog far away from d sight of Pple/visitors which means only d occupants of d house should have access to d dog(s)

Step two: Teaser;
Get a Teaser to tease d dog(s) this particular aspect is done by a professional dog trainer.

Step three: Gunshot training;
D teaser/dog trainer should also be able to train d dog against gunshot sound, meaning DAT d teaser/dog trainer should use a knock out(Xmas fireworks) to carry out this training since such person might not have access to a real gun.

Step four: Arm protector;
D teaser/dog trainer should also train d dog not just to bark but also to be able to bite or a biting suit. For more info on how u can get a professional dog trainer u can call Cj IKE on 08063435927. Or 08143226216.