Final answer:
A vet that only wants to know how a healthy kidney functions could also be called a nephrologist.
Step-by-step explanation:
A vet that only wants to know how a healthy kidney functions could also be called a nephrologist. A nephrologist is a medical doctor who specializes in the diagnosis and treatment of kidney diseases and disorders. They study the anatomy and physiology of the kidneys, including how a healthy kidney functions to filter waste and regulate water balance in the body.