Below is information on animal zoning information by city. Contact the city you live in to confirm latest updates.
Arvada
Arvada's local ordinance permits residents to keep up to five chickens on their property. However, roosters are prohibited due to potential noise disturbances. The city specifies that chicken coops must be placed at least 25 feet away from the homeowner's dwelling and properly maintained to avoid nuisances or health hazards.
https://library.municode.com/co/arvada/codes/code_of_ordinances?nodeId=PTIICOOR_CH14AN
Boulder County
Broomfield
Centennial
Colorado Springs
Denver
Evans
Englewood
Fountain
Ft. Collins
Golden
Littleton
Longmont
Jefferson County
Monument
Pueblo
Westminster