Fulfilling basic human need

One of the reasons for these therapeutic effects is that pets fulfill the basic human need for touch. Even hardened criminals in prison show long-term changes in their behavior after interacting with pets, many of them experiencing mutual affection for the first time. Stroking, hugging, or otherwise touching a loving animal can rapidly calm and soothe you when you’re stressed or anxious. The companionship of a pet can also ease loneliness, and most dogs are a great stimulus for healthy exercise, which can substantially boost your mood and ease depression.