C.R.S. § 25-4-602: Notice to health department or officer if animal affected or suspected of being affected by rabies.

Whenever a dog, cat, other pet animal, or other mammal is affected by rabies or suspected of being affected by rabies or has been bitten by an animal known or suspected to be affected by rabies, the owner of the dog, cat, other pet animal, or other mammal, or any person having knowledge thereof, shall forthwith notify the health department or health officer in the county, city, or town in which such animal is located, stating precisely where such animal may be found.