in a specific location for a specified period of time. 2 In particular, law enforcement canines (LEK9s) are now frequently included on security teams at MGEs. LEK9s have numerous assignments, including explosives and narcotics detection, patrol, tracking, apprehension and arrest, and search and rescue. Their versatility stems from their keen sense of smell, ability to navigate inaccessible areas, and ability to search a given area approximately 50 times faster than a human. [3][4][5][6][7] LEK9s working at marathon or other MGEs may suffer from an acute illness or injury, particularly if an MCI occurs due to a violent attack (eg, bombing, active shooter incident) or a natural cause (eg, extreme weather, structural collapse). At select, high-profile events and exercises, veterinary medical professionals may be present onsite to provide immediate treatment. For example, National Veterinary Response Teams are deployed for National Special Security Events such as political conventions, presidential inaugurations, and the United Nations General Assembly. While increasing the presence of veterinary medical professionals at MGEs is worthy of attention, professional veterinary support is not routinely available at most MGEs with LEK9s on site.