Dogs with elevated liver enzymes are being tested in Denver and Denver-area veterinarians are working to identify the cause.
The Denver Department of Health says dogs with elevated levels of liver enzymes will be tested and tested again if they are positive for hepatitis C.
The new tests are coming after the city and its health department said they would begin testing for elevated liver enzyme tests in 2018.
Hepatitis C is a virus that affects the liver, which normally breaks down waste products from the body.
Dogs can contract the virus by eating food contaminated with feces or other raw materials.
The disease can cause the liver to fail and cause other symptoms including high blood pressure, liver damage, and liver failure.
People can get hepatitis C by eating raw or undercooked meat, drinking contaminated water, or having unprotected sex.