Owners bring their dogs to a park in Los Angeles on Wednesday, Aug. 31, 2022. Veterinary laboratories in several states, including Oregon, Colorado and New Hampshire, are investigating an unusual respiratory illness in dogs that causes lasting illness and doesn't respond to antibiotics. The Oregon Department of Agriculture, which is working with state researchers and the U.S. Deparment of Agriculture's National Veterinary Services Laboratory to find out what is causing the illnesses, has documented more than 200 cases of the disease since mid-August 2023. (AP Photo/Richard Vogel, File)
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