Mystery Dog Illness Update 2024. Dogs are falling sick with a mystery illness across the united states, with cases being recorded in at least. Explore the latest on the respiratory disease crisis in dogs, including atypical canine cough and severe acute pneumonia.

A mysterious canine illness is spreading throughout the country that can linger for months, cause fever, pneumonia and, in rare cases, death. Last year and can lead to serious or fatal respiratory problems is still under investigation, but cases are starting to.