A canine flu outbreak in Chicago has led to more than 1,000 cases and the death of five dogs between January and March, the Chicago Tribune reported.
On Friday, the Cook County Department of Animal and Rabies Control warned pet owners to avoid dog parks, group dog training facilities, doggy day care businesses, and other areas where dogs can congregate.
Even without showing symptoms, dogs can be contagious with canine infectious respiratory disease, officials said. It cannot be transmitted to people.
"We've had a lot of calls to our office, asking, 'What is going on?'" Dr. Donna Alexander, the county's animal control administrator, told the Chicago Tribune. "We have veterinarians calling us saying we are seeing this."