CHICAGO (CBS) — A suburban dog park has been closed temporarily, because of the recent outbreak of dog flu.

Happy Bark Dog Park in southwest suburban Evergreen Park will be a no-bark zone for at least a week or two.

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Evergreen Park Mayor Jim Sexton said, on the advice of a local veterinarian, the village has closed the dog park at 91st Street and California Avenue. He said no date has been set when the park will reopen.

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The Cook County Department of Animal and Rabies control said there have been more than 1,000 cases of canine influenza in the area, and five dogs have died.

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Experts have said dog flu can spread even when dogs are not showing symptoms – which include a persistent cough, sluggish behavior, poor appetite, and fever.