A mysterious illness is sickening dogs in several states. Some are dying


But within an hour of playing, Thunder was back in the emergency room with respiratory distress. And soon after that, Heckemeyer and her husband, both residents of Colorado, received a call from the vet to come in and say their goodbyes.
Very little is known about the illness, but veterinarians say it usually starts with a cough that might last for weeks, then progresses to…
This story appeared on washingtonpost.com, 2023-11-21.