What are the positive effects of having pets? Some studies say that it can help in patient treatment that's why there is something called pet therapy or Animal Assisted Therapy (AAT).A drop in the level of cortisol associated with pet watching makes one feel better. It can make patients feel happy because of the increase in the feel good hormone oxytoxin as well.
Research also shows that pets like dogs are also able to read human emotions by looking at their faces. Thus, it is more valuable to have pets are home.
Link: Human-Like Relationship with Pets (relationships); Self