cant speak for that specific dog but one of my old high school friends is a Seal in the dog program. Some of the dogs are taught to go for the throat opposed to limbs and those dogs are muzzled while wearing gear (work mode) unless they are just with their handler or on assignment.
they go for whatever is a threat. the ones at ft benning would tear your weapon off at the wrists. if there was no weapon, it would go for your neck. if you were running it would go for your inner thigh. the muzzle went on when they showed their dogs to us as they did not know our scent. a nice guy we hung out with made us spit in the dogs mouth and play with him afterwards. he said the dog would never forget you after that. i believed him!