Dogs that have a lot of social contact with unfamiliar dogs are also at risk. (vetinfo.com)
Herpes is an extremely common canine virus and most dogs with social contact with other dogs will be exposed. (vin.com)
Studies show that smiling is used as a way to form bonds with others [25] and that smiling behavior is more pronounced when people are engaged in social contact [26]. (journals.plos.org)