This cute little dog died from something very rare and uncommon in dogs – systemic herpes virus. If she were a human her family would have sued the doctors for gross negligence and malpractice. She did not die from canine influenza and did not have kennel cough as AWL suggested.
A necropsy was done and the necropsy report for Cameo showed she was negative for the flu. Cameo died a horrible painful death from systemic herpes virus resulting in necrotizing rhinitis, necrotizing splenitis and other complications from herpes. This was an excruciatingly painful way to die. Cameo was given two drugs which no competent vet would use and they are called: Chloramphenicol and Amikacin which likely affected her immune system and her bodies ability to fight the viral infection.