Michael Mullen has been a visiting veterinarian making house calls in the Austin area since the 1980s. He holds a DVM from Texas A&M University and is a member of the American Veterinary Medical Association. His unique veterinary approach was highlighted in The New Yorker's 2024 short documentary ""The Passing."" Kate O'Neill encouraged Michael to write his experiences and helped gather and polish them into a book. Originally from Houston, she resides in the Austin area.