Many of today's veterinarians have refused to do canine ear trims even when requested to do so by a client. The reasons for refusal are many and varied. Most veterinarians were never taught to procedure while in school and have therefore never tried the surgery.
"Canine Ear Trimming,"
Iowa State University Veterinarian: Vol. 32
, Article 5.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol32/iss2/5