A two-year-old, spayed female Labrador presented with a two-week history of illness. The initial problem was swelling and discharge from the left eye. The owner thought that the eye may have been traumatized as this is one of two dogs that have free run on an acreage with a creek. The eye infection responded to antibiotic treatment. Soon after developing the eye infection, the dog became anorectic and had breathing difficulty. These problems did not respond to the antibiotics. She also had a seizure that was treated with antibiotics and steroids. At the time of presentation to the Iowa State University Teaching Hospital she had begun to vomit, was breathing with more difficulty and was completely anorectic with a weight loss of 14 pounds.