If it were a person and not a cat - you would presumptively have a cause of action for punitive damages. However, recent case law (not in Pennsylvania) in California have awarded intentional infliction of emotional distress in these same instances - punitive damages have been awarded. There are no Pennsylvania cases on the subject.
You can't be sued for slander - file a complaint with the veterinarian association and the BBB.
Attorney
19 years legal practitioner: real estate, collections, estate, civil, business, and criminal law