At the beginning of the day, all of the study participants had a saliva sample taken to determine baseline levels of Cortisol, a hormone that measures a person's stress. There were no noticeable differences in starting stress levels across all employees.
But as the work day wore on, Barker found noticeable differences between the stress levels of those with and without dogs by their side.
Barker then had members of each group report their stress level at four different times throughout the day and found that the workers accompanied by their dogs reported the lowest amount of stress at all points in the workday. The most stressed out group turned out to be dog owners that left their pets at home.
The benefits go far beyond just reducing worker stress, though, Barker said. Dogs owners who were allowed to bring their dog to work reported high perceived organizational support (the feeling that one's employer cares about his or her personal and professional development).
Comments from participants in the study indicated an array of other possible benefits, including increased productivity, higher employee morale, and increased co-worker cooperation, Barker said.
"Dogs were a communication energizer," Barker said. Dogs in the office tended to spark conversations between those with and without pets, and "people who didn't typically talk to one another, were now more engaged" with dogs in the office, Barker said.
Nearly half of those who brought their dogs in reported increased productivity, while the rest reported no remarkable difference in their daily work output. A majority (80 percent) of those who did not bring dogs in did not report reduced productivity in the office, and 25 percent said dogs positively affected productivity.
Barker said there are issues companies should consider before enacting a dogs in the office policy, including whether or not the pets are well-behaved, employees potentially having pet allergies or a fear of animals, and the organizational culture of the company.
The study's findings on the positive effect of dogs in the workplace were unsurprising to Replacements, however.
"This is not anything new to us," Lisa Conklin, public relations manager for Replacements said.
Replacements enacted a pets in the office policy 17 years ago when founder and CEO Bob Page received a dog of his own and didn't want to leave it home alone. The office has seen a slew of interesting pets since, including a duck, a pot-bellied pig, and an opossum.
Customers can even get in on the fun. On the outside of the store is a sign encouraging customers to bring in any well-behaved pets, Conklin said.