According to Carrington.edu, Studies have shown that pets help people who are anxious or depressed focus on the present, because they have to pay attention to the care of their pet. Caring for another living creature improves their sense purpose and creates a feeling of being needed.
A relationship with an animal requires a different method of communicating, and for people who are anxious or depressed, that is often a preferred way to interact. Some people who suffer from depression or anxiety self-isolate, but having a dog with them can be an ice breaker.