This guide covers veterinary practice and animal health regulation from licensure and the client relationship through prescribing, records, liability, and board discipline. It begins with the structural facts that shape everything: three parties rather than two, an animal classified as property, and a practice that operates a pharmacy without a pharmacist. It sets out the veterinarian-client-patient relationship and the contested question whether it can be established remotely, then works through extralabel drug use, the food-animal conditions where the serious exposure sits, compounding limits, and controlled substance obligations with the diversion patterns that generate cases. It treats malpractice with attention to the damages ceiling that decides whether a case exists, the theories eroding it, and the consumer protection route that bypasses it. Separate parts address informed consent and written estimates, euthanasia and abandonment, ownership disputes, technician scope and its antitrust shadow, practice ownership and wellness plans, employment and occupational hazards, animal welfare and disease reporting, records and access, advertising, accessibility, transitions, and board complaint response.