Another study shows that dogs may very well be man,s best friends. According to the report, owning a dog may prevent hypertension.
As part of the analysis, investigators monitored the blood pressures and stress responses of 60 hypertensive adults who were caring for brain-injured spouses. Half of the subjects adopted dogs. After six months, dog-owners exhibited significantly lower blood pressure rises in response to stress, compared with those who did not own dogs.
Society for Psychophysiological Research October 19, 2000.