How do you address and envelope when wife if a veterinarian?

When addressing an envelope to a veterinarian who is married, you would typically write the husband's name first, followed by "and Dr. [Wife's First Name] [Last Name]." For example: "Mr. John Smith and Dr. Jane Smith." If you prefer to emphasize her title, you could also write "Dr. Jane Smith and Mr. John Smith." Make sure to check the couple's preferences, as some may prefer different formats.