1. Except as otherwise provided by municipal ordinance, it shall be the duty of the pound supervisor to deliver from among the available impounded animals on the demand of an institution possessing a license, such number of animals as the institution may demand and be reasonably required effectively to carry on its activities, subject to the following conditions:
2. Such animals shall have been impounded at least fifteen (15) days for dogs without a license, and at least thirty (30) days for dogs with license and remained unclaimed and unredeemed by their owners or by any other person desiring the animal as a pet and willing to pay applicable license fees and the reasonable expenses incurred in the dog's detention; and
3. Any owner of an animal who voluntarily delivers the possession of it to a public pound shall have a right to specify that it shall not be used for scientific research, and if an owner so specifies, it shall be the duty of the pound superintendent to tag such animal properly and to make certain that such animal is not delivered to an institution for scientific purposes; and
4. If a demand is made on a pound supervisor for a greater number of dogs than he has available for release to the institution, the supervisor shall withhold thereafter from execution all unclaimed and unredeemed dogs until the demand has been met; and
5. Any animal in the pound to which an identification tag is attached may not be disposed of until the owner has been notified.

B. Any city may adopt an ordinance setting the number of days an animal must be impounded and setting restrictions or prohibitions on the delivery of animals for scientific research.