As used in this article, the following terms shall have the meanings indicated:
Any establishment wherein or whereon the business of boarding or selling dogs or breeding dogs for sale is carried on, except a pet shop.
Any room or group of rooms, cage or exhibition pen, not part of a kennel, wherein dogs for sale are kept or displayed.
An establishment for the confinement of dogs seized either under the provisions of this Part 1 or any other law.
Any establishment where dogs are received, housed and distributed without charge.