Any animal in an animal holding facility which is injured or which shows signs of illness or symptoms of contagious disease shall be immediately isolated in such manner as to prevent the spread of such illness or disease to other animals or to prevent the exacerbation of any injury. All sick, diseased, or injured animals in an animal holding facility shall be provided immediate veterinary care by a doctor of veterinary medicine licensed to practice in the State of Maryland or under the supervision of such licensed veterinarian. Cages, crates, enclosures, or other areas in which animals have been housed or held shall be decontaminated before being used by another animal. No animal that is ill or diseased, shows visible evidence of any current illness or disease, or is injured in any way may be sold, exhibited in a petting zoo, used as a guard dog or for guard dog training, or used or exhibited for equestrian training or show.