It shall be legal for any person to own, possess, or harbor any wild or exotic non-domesticated animal with proper permits within the city limits, but illegal to offer for sale. Any owner of such an animal at the time of adoption of this section shall have 30 days in which to remove the animal from the city after which time the city may impound the animal as provided for in this section. An exception shall be made to this prohibition for animals specifically trained for and actually providing assistance to the handicapped or disabled, and for those animals brought into the city as part of an operating zoo, veterinarian clinic, scientific research laboratory, education or training event, or a licensed show or exhibition, and meet state guidelines, including the owner must receive approval from the city.