Purely Cosmetic Home And Health Tail Docking?

Tail Docking? - purely cosmetic home and health

Recently got a Jack Russell Terrier our neighbors who can care for them. However, do not say that she was pregnant. Tali, as we called them, is in about a week. Search and veterinarian visits, so we prepared for delivery (we've already got plans for her spayed as soon as possible, and they found a loving home for the puppies), all family members. But I'm curious to docking. Tali was the tail. Is there a negative? It is a purely aesthetic? If we have to do it to the vet, if we decide? To aproach your vet, you ask?