Dogs’ sense of smell is very powerful. So if there are unknown people or persons who he thinks do not have a good intention over his master or his master‘s possessions, he will easily signal you. Pet dogs are of good help especially at night when everybody is sleeping. If you are a deep sleeper, might as well get a pet dog so that even you are not awake, there is someone who will be awake whenever there are emergency around like fire or other related things. With pet dogs, your apartment can be more secure. You can live and sleep soundly and safely.