All dogs and cats which have been impounded for lack of rabies immunization in accordance with the provisions of this chapter, due notice of which shall have been given to the owner as provided in Section 3-7A-7, may be humanely destroyed and disposed of when not redeemed by the owner within seven days. In case the owner of an impounded dog or cat desires to make redemption thereof, he may do so on the following condition: He shall pay for the immunization of the animal and the penalty as prescribed in Section 3-7A-6 if certificate of current immunization cannot be produced, and in addition, pay for the board of the animal for the period for which it was impounded. The amount paid for the board of the dog or cat shall accrue to the credit of the city or county, depending upon the jurisdiction of the pound in which the animal was confined. At his discretion, the said impounding officer may sell any dog or cat not redeemed or claimed or otherwise disposed of, to any purchaser desiring the said animal, which said purchaser must comply with all the provisions of this chapter.