No person may keep or harbor five (5) or more animals over the age of four (4) months, that require a County license, without first obtaining an animal hobby permit as provided herein. Except as provided herein, no household may keep, harbor, or foster five (5) companion animals, with a limit of ten (10) over the age of four (4) months without first obtaining an animal hobby permit as set forth in Section 3-148.02. Any household keeping, harboring, or fostering more than ten (10) animals prior to the effective date of this law may continue to harbor, foster, or keep such animals as are in existence. Said household cannot replace existing animals beyond the number allowed in Subsection (a), above. This Section shall not apply to a licensed animal holding facility, a licensed veterinary hospital, a circus or travelling exhibition, or the keeping of farm animals, fish, or birds.