Which of the following is NOT a common veterinary practice?

Training animals for shows is not typically considered a common veterinary practice. Veterinary practices primarily focus on the health care, diagnosis, and treatment of animals. This includes administering vaccines to prevent disease, performing surgeries to address various health issues, and conducting health examinations to assess an animal's well-being.

While some veterinarians may assist with training or behavioral issues, training animals for shows is usually the domain of animal trainers or handlers rather than veterinarians. Veterinarians are trained to deal with medical, not training, aspects of animal care, which is why this choice stands out as the least directly aligned with standard veterinary practices.