The city government is now conducting a round of mass testing to look for more cases.
The general public is asked not to feed wild birds and to contact the nearest Colorado Parks and Wildlife office if they find a dead bird in the environment.
An after-hours veterinarian will remain on call.
More than 35 million chickens and turkeys have been killed and removed to avoid spread, the U.
Viruses have been found in U.
For domestic flocks, the disease carries a 90-100% mortality rate.