KINGSPORT – Friday is “Take your Dog to Work Day.” Could there be a better holiday for dog owners? Businesses all around the world are expected to participate in this dog-loving event, now in its 20th year. It was first established in 1999 by Pet Sitters International to encourage businesses to experience the employee benefits of having dogs in the workplace and to promote adoptions from local shelters, rescue groups and humane societies. At the local level, the Kingsport Chamber of Commerce plans to participate in the event, allowing its employees to bring their canine pals to work.