A puzzling infectious illness in dogs is spreading across the US. Here's how to protect your pooch, and what to do if you think they have it.

A puzzling infectious illness in dogs is spreading across the US. Here's how to protect your pooch, and what to do if you think they have it.

One of the more severe symptoms to lookout for is lethargy.Photographer, Basak Gurbuz Derman/Getty Images <ul><li>Dogs across the country have been falling ill with an unidentified sickness.</li><li… [+3746 chars]

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