608-526-2200 | W7683 Old Hwy 93, Holmen, Wisconsin 54636

The finest in veterinary care

Van Loon Animal Hospital excels in laser surgeries as well as orthopedic surgery.

Visit our Petco Clinic!

We have a wellness clinic at Petco. No appointments necessary!

P.A.W.S. Has Arrived!

A healthy pet is a happy pet — Preventative Care Plans are here! Check out the info on our website or give us a call today.

Welcome to Van Loon Animal Hospital

Welcome to our website! Our task is to provide excellent quality, compassionate care, and life-long health for your pet. We look forward to welcoming you and your four legged friends to our animal family. We have an exceptional staff of talented doctors and support technicians with particular interests in all aspects of animal care.

Our family-oriented staff is committed to providing you with state-of-the-art veterinary care while maintaining an atmosphere of respect, support, and continued education. We offer a complete range of veterinary services including routine vaccinations, major and minor surgeries, and dental procedures. We have an on-call veterinarian at all times that is available to see during emergencies. We also have hospitalization, critical care, grooming, and boarding services as well.

At Van Loon Animal Hospital, we treat your pets like the valued family members they are.

Meet Our Team

Mark Hein, DVM


University of Madison School of Veterinary Medicine Charter Class 1987

Dr. Mark Hein is a graduate of the “Charter Class” of University-Wisconsin School of Veterinary Medicine and works closely with this group on referrals in chemotherapy, orthopedics and ophthalmology. He was the first veterinarian to offer laser surgery to pet owners in the La Crosse area as an alternative to more painful conventional surgeries. Dr. Hein also founded the Onalaska-based PETCO walk-in clinics in 1995, where clients may see a veterinarian during evening hours without an appointment. He enjoys orthopedics, archery and organic farming.

A native of Ettrick, Wisconsin, Dr. Hein is proud of his 4 children and his pets, Max the African Grey Parrot, his cats Lucifer & Pumpkin, and three horses, Rogue, Sunny and Cisco. Dr. Hein married classmate Anne-Marie Karwoski in 1990, and they now reside in Trempealeau. Together they farm 10 farms in Trempealeau and LaCrosse County.

Dr. Mark Hein & Cisco

Dr. Mark Hein & Cisco


Practice Manager

Sarah is our Practice Manager and has been with our hospital since 2009. Her and her Husband have two Labrador Retrievers, Buddy & Moose, one Bengal cat named Brasco, a red devil cichlid fish, Hector, an African Gray Parrot named George and a Quaker Parrot named Quakers. In her free time she enjoys catfishing, gardening and being outdoors.

Sarah, Practice Manager with Bear & Moose



Lead Certified Veterinary Technician

Heidi is a Certified Veterinary Technician who moved here from Washington State in 2012 with her husband. She has been a certified technician since 2006. Since moving to Wisconsin, Heidi has been a die-hard Packer fan. She has never missed watching a game and has been to one game at Lambeau Field, with hopes of attending many more. She has two dogs, Buddy and Burt, and two cats, Toby and Praline.

Heidi & Burt




Lizzie recently graduated from Globe University with an Associates in Veterinary Technology. She is waiting to take her certification exam this fall. She grew up in the Melrose area and graduated from Melrose-Mindoro High School. Lizzie has three dogs,Penelope a Miniature Dachshund, Buddy and Ellie; both Golden Retrievers. During her free time she enjoys music festivals, water sports and going to the gym.

Lizzie and Penelope



Emily attended Western Technical College in 2013 to study large animal science after graduating high school. She has worked in Veterinary clinics ever since ranging from holistic to conventional medicine. A few of her favorite parts of the field are working as a lab technician, assisting in surgery and working everyday to better her skills. Her passion is nursing her patients back to health with compassion as well as helping pet parents decide what route to take, whether more natural or medicinal. Emily and her boyfriend live in LaCrosse with their Border collie Whinnie and Rex Rabbit Rupert. Her hobbies include gardening, yoga and dog sports.


Veterinary Technician

April is a Veterinary Technician and has been working in the field ever since she attended the Veterinary Technology program at Duluth Business University in 2012. She enjoys preforming dental prophylaxis, and giving compassionate care to our recovering patients. April has a Manchester Terrier named Bandit, a Terrier Mix named Eddie and a Sheltie/Spaniel mix named Margot. She also has 2 domestic long haired cats, Hazel and Cubby, a Maine Coon, Tux, and last but not least Florence the Sun Parakeet. She moved to La Crosse from Madison, WI with her fiancé, Andy. They are new homeowners in the LaCrosse area and plan to stick around for the long haul.

April with Bandit and Margot




Chris has been grooming at our facility since 2001. Prior to grooming she worked with us as a doctor assistant. She grew up in Holmen and comes all the way from Rushford to join us. Chris enjoys grooming her own pets when she is not attending to her three beautiful children.


Kennel Attendant

Kendre’ joined the team in August of 2017 as a Kennel Attendant. Kendre has two cats Mouse and Little Man and two dogs Echo and Kylie. Kendre volunteers as a foster family for Australian Shepherds. She enjoys woodworking and dog training in her spare time.

Kendre’ & Echo



Prevention and Wellness plans are here! Please look under our services tab for more information.



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