As used in this article, the following terms shall have the meanings indicated:
A dog's attainment of the age of seven months or the time when a dog shall possess a set of permanent teeth, whichever occurs first.
Includes every person having a right of property in a dog and every person who has a dog in his keeping or harboring. The term shall not, however, include any person who keeps or operates or proposes to establish a kennel, a pet shop, a shelter or a pound in connection with the ownership of a dog. Such persons shall be bound to comply with the appropriate state statutes and regulations covering their activities, licensing and registration.