All dogs six (6) months or older shall be vaccinated against rabies. Before issuance of the license the owner shall furnish a veterinarian's certificate showing that the dog for which the license is sought has been vaccinated, and that the vaccination does not expire within six (6) months from the effective date of the dog license. It shall be a violation of this Ordinance for any dog to not be vaccinated against rabies. A tag showing evidence of proper vaccination shall be worn by every dog when not confined.
(Code of Iowa, Sec. 351.33)