The Animal Control Officer shall canvass the county to determine if there are any dogs or cats not wearing the required rabies vaccination tag. If a dog or cat is found not wearing the required tag, the Animal Control Officer shall check to see if the owner's identification can be found on the animal. If the animal is wearing an owner identification tag, or if the Animal Control Officer otherwise knows who the owner is, the Animal Control Officer shall notify the owner in writing to have the animal vaccinated against rabies and to produce the required rabies vaccination certificate to the Animal Control Officer within three days of the notification. If the animal is not wearing an owner identification tag and the Animal Control Officer does not otherwise know who the owner is, the Animal Control Officer may impound the animal. The duration of the impoundment of these animals shall be established by the county board of commissioners, but the duration shall not be less than 72 hours. During the impoundment period, the Animal Control Officer shall make a reasonable effort to locate the owner of the animal. If the animal is not reclaimed by its owner during the impoundment period, the animal shall be disposed of in one of the following manners: returned to the owner; adopted as a pet by a new owner; sold to institutions within this State registered by the United States Department of Agriculture pursuant to the Federal Animal Welfare Act, as amended; or put to death by a procedure approved by the American Veterinary Medical Association, the Humane Society of the United States or of the American Humane Association. The Animal Control Officer shall maintain a record of all animals impounded under this section which shall include the date of impoundment, the length of impoundment, the method of disposal of the animal and the name of the person or institution to whom any animal has been released.