Wisconsin Veterinary Orthopedics is proud to serve Holmen, WI and surrounding areas. We are dedicated to providing the highest level of veterinary medicine along with friendly, compassionate service.

We believe in treating every patient as if they were our own pet, and giving them the same loving attention and care. We are a group of highly trained, experienced animal lovers who are devoted to giving our patients the best care possible.

If you have any questions about how we can care for your pet, please don’t hesitate to call us at (608) 526-9181. Thank you!


An Alaskan transplant that has twenty years’ experience working with animals large and small. She is a certified Humane Officer and Rabies trained. She has rehabilitated wildlife from Alaskan predators, bobcats, seals, and plenty of raptors down to the tiny Wisconsin opossums’ orphans.

Ellie is owned by two large dogs, and a pigeon that she rehabilitated and released two years ago. The pigeon ‘Buddy ‘although released with two siblings into the wild has decided E/lie is the bee’s knees. Buddy has moved twice; following Ellie wherever she goes.


Is a fourth-year undergraduate student at UW La Crosse. She is studying to become a Veterinarian and is originally from North Carolina and recently moved to Green Bay. In her free time Lauren enjoys playing sports, outdoors and making friends. Laurens perfect day would be a weekend by the lake with her family.


Max is one of our mascots here at Van Loon Animal Hospital. Max is a Long-haired brown tiger cat. You can find him lounging around the yard or sprawled out on the counter silently judging everyone.


Jackson is Dr. Hein’s Loyal steed. He can be found carrying a dog bowl begging you to put treats inside of it. He is very food motivated but so is the rest of the staff.

Dr. Mark Hein and Mrs. Anne-Marie

Dr. Ana Rosa-Rivera

Dr. Ana Rosa-Rivera was born and raised in Puerto Rico. She developed a passion for animals since an early age and found herself working as a volunteer in a veterinary clinic when she was 15 years old. After graduating high school, she obtained a Bachelor’s Degree in Veterinary Technology with a minor in Biology and moved to Georgia where she graduated with a DVM from Tuskegee University, Collage of Veterinary Medicine at Alabama in 2018. In 2019, Dr. Ana moved to Wisconsin and joined Van Loon Animal Hospital, Holman WI, in 2021. Dr. Ana’s professional interests range from emergency and critical care, radiology and orthopedics in small animal medicine to equine medicine in large animal medicine.

During her free time, she enjoys bike riding, reading, learning new languages, and spending time with her family. When she’s at home she likes to snuggle with her 3 –year-old and 1-year-old cats named Brandon and Ryan.


Sara is a fourth-year undergraduate student at UW La Crosse and is studying biology. In her free time, Sara enjoys spending time with her cat Cuba, going on hikes and all winter sports.