Our compassionate team of veterinarians and technicians will care for your pet as if it was their own! We strive to provide the best care at affordable prices. We’re never afraid to go the extra mile for your pet’s health needs!
Our Veterinarians
Dr. Micah Hartwig
Dr. Hartwig brings over two decades of veterinary experience and a deep love for animals to her role as a veterinarian at Acorn Hill Animal Hospital. Graduating from Oklahoma State University in 1998, Dr. Hartwig embarked on her journey in veterinary medicine, fueled by a passion for animal wellness and preventive care.
With a background that includes owning her own clinic in Tulsa, Oklahoma, Dr. Hartwig is a seasoned practitioner dedicated to the well-being of her furry patients. Her expertise spans a wide range of areas, from allergy management to soft tissue surgery.
Dr. Hartwig and her husband, both die-hard OSU Cowboys fans, moved to San Antonio to be closer to family. They share their lives at home with a lively menagerie of animals, including two Labrador Retrievers, a Chihuahua, five cats, and five beloved horses. Whether she's playing tennis, spending time with her horses, or cheering on her two college-age daughters, family remains at the center of her life.
Dr. Maggi R. Mahonski
Dr. Mahonski from an early age knew that she wanted to work with animals. Throughout the years, the thoughts of working with marine biologists and conservationists have come to mind, but the overall goal of becoming a veterinarian had not faded. In May of 2024, Dr. Mahonski graduated from Virginia-Maryland College of Veterinary Medicine with aspirations of entering mixed animal medicine, which stemmed from her love of beef cattle and horses. But as life often does, circumstances changed and landed her in small animal veterinary medicine.
Having grown up with small animal pets, Dr. Mahonski takes a special interest in the older patients, helping them with their golden years aches and pains. Her special interests beyond caring for the geriatric patients are ultrasonography and alternative physical therapy modalities. She hopes to become certified in acupuncture in the future.
Loving her career means Dr. Mahonski has also learned to love her time away to catch up on life and smell the roses. During her free time you can find her exploring towns around the greater San Antonio and Austin areas with her significant other, or with a book or baking spatula in her hand.
Our Veterinary Support Team
Sarah — Practice Manager
In addition to managing our practice, Sarah is an exceptional veterinary technician with a special interest in blood smears and radiographs. Raised in San Antonio, Texas, she earned her Bachelor of Arts in Marketing from St. Mary’s University in 2016. Sarah began her veterinary journey at Acorn Hill Animal Hospital in July 2017, starting as a receptionist. Through dedication and hard work, she advanced through several roles—including kennel technician, technician, surgery technician, and lead technician—before becoming our Practice Manager.
At home, Sarah has three dogs—Mai, Blitz, and Arthur Morgan—and two cats, Kiaba and Kahleese. In her free time, she enjoys gardening, singing, and spending time with her husband and beloved pets.
Amanda — Inventory Manager
Born in Illinois, Amanda spent most of her childhood and early 20s in the Florida Gulf Coast, where she completed her bachelor’s degree in Forensic Science at the University of Central Florida. After being a preschool educator for 8.5 years, Amanda moved to Texas and joined Acorn Hill Animal Hospital as a receptionist but was soon promoted to inventory manager due to her exceptional computing and analytical skills. She is currently enrolled at San Antonio College and pursuing her dream of becoming a licensed funeral director and embalmer.
In her spare time, Amanda indulges in binge-reading romance novels and singing karaoke. She also trains, fundraises, and runs with Team World Vision to help end the clean water crisis worldwide.
Heidi — CSR Manager
Heidi is a team player born and raised in California before moving to Texas. A firm believer in high-quality client service, Heidi is well versed in daily veterinary operations and customer interactions. Although journalism was Heidi’s first career choice, she found client service very fulfilling. She is passionate about politics and history and her interest in these subjects has led her to volunteer towards saving historical monuments and joining local marches.
Larissa — Lead Surgery Technician
Larissa joined the Acorn Hill family in November 2024 with a background in business management, over a decade of customer service experience, and a deep love for animals. Despite having no prior veterinary experience, her eagerness to learn and strong work ethic made her a quick study. She now serves as our Lead Surgery Technician, providing attentive care to every patient that comes through the surgical suite.
Around the clinic, you might hear her affectionately called “Larry”—a nickname from her childhood, given by her best friend Sierra, who also works at Acorn Hill. At home, Larissa enjoys the company of her two cats, Noodle and Kitty Man, who always keep things interesting. In her free time, she loves attending concerts with her girlfriend, watching scary movies, and indulging in sweet treats.
Sam — Customer Service Representative
Sam is a dedicated wife and mother of two boys who keep her busy with school activities and extracurriculars. When she's not cheering on her kids, you can find her at home cuddling with her three fur babies. With over 15 years of experience in the veterinary field, Sam has worked as a technician and now brings her expertise to the front office team.
Kristie — Veterinary Technician
Kristie joined the Acorn Hill family as a Veterinary Assistant in June 2024 and has loved getting to know each patient—from nose to toes! Before entering veterinary medicine, she managed a Whataburger while attending school, all in pursuit of her dream to work with animals. Kristie treats every patient as if they were her own and is dedicated to making each visit as comfortable as possible.
At home, she shares her life with a lively group of pets—Rex, Marley, Jack, Sally, and Milo. Outside the clinic, Kristie enjoys taking her pups to the park and attending concerts with her husband.
Sierra — Veterinary Technician
Sierra began her veterinary journey at the Bel-Rea Institute of Animal Technology in Aurora, Colorado, where she earned her Associate of Applied Science degree in Veterinary Technology. After gaining hands-on experience in the field, she returned to her home state and joined the Acorn Hill family in June 2024. She is currently working toward becoming a licensed veterinary technician.
At home, Sierra has a full house with her four dogs—Storm, Skye, Binky, and Zuko—and three cats—Dany, Bug, and Moose. In her free time, she enjoys spending time with her husband, Nathaniel, playing video games, and relaxing.
Alex — Veterinary Technician
Alex joined the Acorn Hill team in April 2024, bringing with her a lifelong love for animals. She began volunteering at the humane society during high school, which sparked her interest in veterinary care. In 2021, she started working as a kennel technician and quickly advanced to a veterinary technician role later that year.
At home, Alex is surrounded by her beloved pets—three cats named Purcilyn, Apollo, and Oden, along with her husky, Luna.
Audree — Veterinary Technician
Audree joined the Acorn Hill team as a Veterinary Technician in November 2024. Her passion for veterinary medicine began in high school through her school’s agricultural program. After graduation, she attended the Pima Medical Institute, where she earned her certification as a Veterinary Assistant. Audree has now been working in the veterinary field for about five years.
Her sidekick is Mikloh, a pup she rescued from the Humane Society of San Antonio—originally named Shamrock. Outside of work, Audree enjoys teaching swim lessons and spending quality time training with Mikloh.