Wyo. Stat. § 11-31-213: Registration; vaccination certificate required.

The board of county commissioners may require the registration of all dogs and cats within a rabies control district and may require the owner or person having the right to possession of any dog or cat in the district three (3) months of age or older, to present a valid rabies vaccination certificate showing the dog or cat has been vaccinated for immunization against rabies by a licensed veterinarian as a condition for registration. The vaccination certificate shall indicate the date of vaccination, the type of vaccine used and the period of immunization.