+1 what Kerrybelle said. Also, if you're adopting an adult dog, they are evaluated and you would know before getting the dog if there was a people problem. Attacks on people are far more likely with many other breeds. The issue is with other dogs.

Not only that, the dog would not have free run of the office, when not with me it would be crated or kenneled in a quiet space. My clinic is set up that I am not unexpectedly interrupted by a patient/child/whatever, they have to get past reception first.