I found this for you. It's the Denver animal ordinances.

http://library.municode.com/index.as...eName=Colorado

You may want to also check the county and State laws as well. The easiest way is to Google your county or state. State, County, City governments will normally have an official website that usually end with ".gov". From that website you should be able to navigate to the current laws and ordinances.

From what I saw, Denver's pet license only applies to dogs and cats. Good luck...