This makes places with large numbers of dogs in close confinement the ideal breeding grounds. (vetbabble.com)
Veterinary care, staffing, and humane living conditions are expensive and cut into the profit margin, particularly for large numbers of dogs. (thepuppymillproject.org)
Most likely, your dog was exposed to the herpes virus at a kennel, groomer, dog show or animal shelter - any place where large numbers of dogs gather at one time. (2ndchance.info)