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New dog flu strain spreading in parts of U.S.

Posted: 7:20 AM, Jan 14, 2016
Updated: 2016-01-14 19:35:36Z

There's a new strain of dog flu spreading in parts of the U.S., and it's dangerous to the animals.

More than 1,000 dogs in Chicago were treated in a 2015 outbreak. Vets say the virus is highly contagious .

Montana and the State of Washington have also seen cases. A vaccine was released in late 2015 after cases were discovered in dozens of states,  according to a report .

The strain is H3N2 and is derived from a strain of the avian flu. Symptoms include breathing problems, coughing and low energy. Dogs may show a lack of appetite and have some nasal discharge.