N.J. Stat. § 45:16-14
As used in this act:
"Unretrieved animal" means an animal placed for confined treatment or boarding by its owner or an agent thereof in the care and custody of a veterinarian or boarding kennel, which animal is not retrieved by the owner or agent thereof from the veterinarian within 72 hours of being notified in any manner that the confined treatment is completed or from the boarding kennel within 72 hours of the last day the animal was to be boarded.
"Humane disposal" means euthanasia by or under the direct supervision of a veterinarian or placement in a suitable home or animal shelter which shall not include any home or shelter which engages in animal experimentation or, by sale or otherwise, makes animals available for the purpose of animal experimentation. Humane disposal shall not include hypoxia induced by decompression or in any other manner or the administration of a lethal gas other than an inhalant anesthetic.
N.J.S. § 45:16-14