Our Veterinarians

Dr. Natalie Adams


Medical Director & Veterinarian

Dr. Adams is a graduate of Virginia Maryland Regional College of Veterinary Medicine. She did a small animal medicine / surgery internship at Michigan State University before heading out to Colorado in 1997.

Dr. Adams practiced at a 24 hour small animal veterinary hospital in Thornton for 18 years prior to joining the Arrowhead Animal Hospital team. She is certified in small animal rehabilitation and veterinary acupuncture. Her other special interests include geriatrics, surgery, and ultrasonography. Dr. Adams lives in Boulder and enjoys many outdoor pursuits, including trail running, skiing, and hiking peaks with her microbeast Abel.

Dr. Sullivan, DVM


Dr. Sullivan graduated from the University of Central Florida with an undergraduate degree in Chemistry before going on to veterinary school at the University of Tennessee College of Veterinary Medicine. She graduated from veterinary school in May of 2018. She then moved back to Florida and later that year married her soulmate, Alex. They are the only human components of their 6 member family including two cats, Ice and Rue, one dog, Vixey, and a bearded dragon, Randall. She loves that she is able to give a voice to the otherwise voiceless pets that we love and care for. She has a major passion for all species of animals, pain management, and surgery. She moved from Florida to Colorado at the beginning of 2021 and is very excited to be a part of the Arrowhead team.

Dr. Johnson

Dr. Johnson, DVM


Dr. Johnson earned his doctorate of veterinary medicine from the University of Iowa in 1987. He then began working at a small animal hospital in Wheat Ridge where he worked for 29 years. After that he worked for 6 months at an animal shelter in Evans, Colorado, followed by 2 ½ years at Broadlands Veterinary Clinic in Broomfield. He joined us here at Arrowhead Animal Hospital, PC in March of 2019. When not working, he enjoys fishing, boating, hiking and camping.

Dr. DesMarteau

Dr. DesMarteau, DVM


I am a Chicago area native and graduated in 2014 from University of Illinois with Bachelors in Animal Science before working as a veterinary technician for 2 years. I then completed my first 3 years of veterinary school at St. George’s University in Grenada and finished my clinical year at Virginia-Maryland in June 2021. I currently have 1 dog, Tig, who is a 4 year old “pot hound” (name for Caribbean island dogs); I obtained him after taking care of a a stray for the first couple months there, who we didn’t know was pregnant until she gave birth to 3 puppies in my bushes – during Midterm week! So we had to keep one. My passions in life outside of the veterinary field include music and well-being. I spend my free time attending concerts or music festivals and staying active by taking my dog on long walks, going to the gym frequently, and hiking – and when I have time after that I like to be crafty. I grew up in a family of 5 kids being the only girl – so I am big into sports, with the Chicago Cubs being my #1 !

Dr. Griffin

Dr. Griffin, DVM


Dr. Griffin grew up in rural western New York where she knew from a young age she was going to be a veterinarian.  She graduated from Cornell University College of Veterinary Medicine with her DVM degree in 1994.  Upon graduation she moved to Charlotte, NC to escape the snow.  She worked in a mixed-animal practice for 2 years, then decided to focus on all small animals.  After 12 years in the South (and discovering Colorado during a conference), she decided she was brave enough to handle snowy winters again and moved here in 2006.

Dr. Griffin was an associate veterinarian at a small animal practice in Thornton for 15 years before joining the Arrowhead Animal Hospital team in January 2022.   She has a special interest in internal medicine.  During her free time she enjoys travelling, visiting various beaches around the world, and is an avid sports fan – Go Broncos!

Dr. Sasha Higgins

Dr. Higgins, DVM


Bio coming soon!

Dr. Ashley MacDonald

Dr. MacDonald, DVM


Dr. MacDonald grew up in Michigan where she received a bachelor’s degree of biology at Central Michigan University before graduating from Michigan State University College of Veterinary Medicine in May 2021. Since moving to Colorado, she has worked in small animal emergency medicine and is passionate about helping people care for their furry family members when they need it most. She joined the Arrowhead Animal Hospital team in March 2022 and believes our incredible patient care team and client service representatives are the foundation of us providing high quality patient care. Special interests include performing surgery, mitigating patient pain, and limiting stress of veterinary visits for everyone involved. Dr. MacDonald has two cats, Binx and Tangerine, who she rescued and loves to spend time with. When not in clinic, she enjoys reading, going to concerts with friends, trying out new recipes, and swimming in the ocean any chance she gets. Pronouns are she/her/hers. Se habla español.

Dr. Anema, DVM


Dr. Anema received her veterinary doctorate from Colorado State University in 1997. She is particularly interested in internal medicine as well as preventative care. In her free time, Dr. Anema enjoys gardening, beading, making jewelry and spending time with her husband and two cats. She is a native Coloradan and grew up in the Denver area.

Dr. Anema is an American Association of Feline Practitioners (AAFP) member veterinarian.

Dr. Fisher, VMD


Bio coming soon!


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