Along with the scientists' bodies the group finds a dog, which attacks Mulder and Bear. Scully notices black nodules on its skin and suspects that it may be infected with bubonic plague; she also notices a rash on its neck and movement beneath its skin.
While exploring the scientists' bodies, the group encounters a dog that attacks Mulder and Bear. Scully examines the animal and believes it might be afflicted with bubonic plague due to black nodules on its skin, along with a rash on its neck and signs of internal movement.