This issue of Veterinary Clinics: Small Animal Practice, guest edited by Drs. Maureen McMichael and Melissa Singletary, focuses on Working Dogs: An Update for Veterinarians. This issue is one of six issues published each year. Articles in this issue include, but are not limited to: Introduction to Working Dogs; Preventative Health Care and essential equipment needs; Anesthetic Considerations in Working Dogs; Dentistry for Working Dogs; Nutrition in Working Dogs; Current Rules and Regulations for Working Dogs; Canine Olfaction; Sports Medicine and Rehabilitation in Working Dogs; Herding and Sporting Dogs; Breeding Management and Production in Working Dogs; Development and Training for Working Dogs; Military Working Dogs; Operational Canines; and Assistance, Service, and Therapy Dogs.