Pet ownership has significant health and mental health benefits. For example, research by Anderson and associates in 1992 discovered that pet-owners were significantly less likely to develop coronary heart disease. A study by Serpell in 1991 found that acquiring a dog or a cat reduced the frequency with which people suffered minor ailments. In addition, pet ownership can have major mental health benefits. Studies have found that human-animal interaction can increase levels of oxytocin in the brain, resulting in increased calmness and focus. Many owners also report that their pets help them combat loneliness, depression, and other mental health issues.
Good health and happiness are in the interests of both tenants and landlords. A healthy tenant is less likely to run into medical issues or other problems that could affect their income and ability to pay rent.