A Family-Owned Operation

Meet Our Team

At Elk Creek Animal Hospital, we treat you and your pets like our family! Get to know our exceptional team below.

Our Doctors

Dr. Aaron Bessmer

Dr. Aaron Bessmer


Dr. Aaron Bessmer has always had a passion for taking care of animals. Growing up in nearby Pender, Nebraska, he had a wide variety of animals. After graduating from high school in Pender, he earned his undergraduate degree at the University of Nebraska. He then went on to study veterinary medicine at Kansas State University, earning his Doctorate of Veterinary Medicine in 2007. Dr. Bessmer moved to Hartley, Iowa, where he practiced for one year before moving back to Sioux City. He joined the team at Roach Animal Hospital, where he practiced for nearly four years. In 2012 Aaron and his wife Rachel purchased Elk Creek Animal Hospital. In 2020 Dr. Bessmer and Rachel purchased Vermillion Veterinary Clinic. They split their time between their clinics and enjoy working with all of their clients in the Tri-state area. Dr. Bessmer and his wife Rachel have three girls, two dogs, and four barn cats that keep them busy in their spare time. Dr. Bessmer also enjoys being outdoors, hunting, fishing, and watching the Huskers play football.

Dr. Kalene Gross

Dr. Kalene Gross


Dr. Kalene Gross grew up on a farm in Rosalie, Nebraska. She always loved caring for the farm animals, especially the farm cats. Being on a pig farm, Dr. Gross also took care of numerous dogs and a wide variety of farm animals. After attending Bancroft Rosalie High School, she went on to earn her Bachelor of Science degree at Morningside College and was a part of the women’s basketball program. Dr. Gross continued her education in the UNL/ISU veterinary program earning her Doctorate of Veterinary Medicine degree from Iowa State University in May 2018. Dr. Gross and her husband live in Sioux City and enjoy all the things to see and do in the Siouxland area. She enjoys playing basketball, golfing, visiting family and friends, and spending time with her dog, Zeke, and cat, Jaylon, in her free time. She is looking forward to meeting you and all your four-legged friends!

Rachel Bessmer

Rachel Bessmer

Office Manager & Practice Owner

Rachel was born and raised in Nebraska. Her passion for animals began at an early age when she would accompany her Dad while calling on farmers. She graduated from Wayne State College with a degree in business management. After Dr. Bessmer and Rachel married, they purchased Elk Creek Animal Hospital with the goal of providing the best customer service and patient care to their clients and creating the best possible workplace environment for their employees. The duo works well together with their two degrees, and although Dr. Bessmer’s main focus is the animals and Rachel’s main focus is the business side, running a vet clinic is a family affair, and they both work in all parts of the clinic. You will often find their daughters helping as well.

Our Staff

Brooke Martin

Assistant Manager

About Brooke

Brooke has been working at Elk Creek Animal Hospital since 2014.She really enjoys making every fur baby and their owner feel like home as soon as they walk in the door. You will often see her doing different roles from the front desk, assisting in an appointment and doing paperwork in the back. In her free time, you’ll catch her spending her time with her son, husband and dog.

Haley Jo Clark

Client Service Coordinator

About Hailey Jo

Hailey Jo joined our team in July of 2020 and works as one of our Customer Service Coordinators. She takes pride in welcoming you and your furry loved ones into our Elk Creek family. The most rewarding part of her job is witnessing patients get back to acting like themselves after being ill.

Hailey Jo graduated with a business management degree from Morningside College in 2019. She has a love for animals, as she has 5 of her own. Outside of work she spends time traveling with her fiancé to visit family, surrounds herself with life-long friends, and stays fit by teaching dance. 

Nicole LaScala

Client Service Coordinator

About Nicole

Nicole has been with Elk Creek since August of 2020. She is a Sioux City native, born and raised, and has always had a love of animals. She grew up around dogs, cats, and birds, and can’t imagine her life without them. Her favorite part about working at Elk Creek is being around animals and getting to learn something new every day. In her free time, Nicole like to watch movies and hang out with her cat Boco.

Abby McCormick

Certified Veterinary Technician

About Abby

Abby McCormick has been a Veterinary Technician at Elk Creek since December of 2019. She was born and raised here in Sioux City. From a young age, Abby knew she wanted to work with animals. She graduated the Veterinary Technology Program at Northeast Community College in May of 2015. From there she moved to Lincoln, NE where she worked as a technician. She decided to move home at the end of 2019 to be closer to family.

When asked what she likes most about being a Tech, Abby said,

‘Animals help make us better people, so I love knowing that I am able to care for the animals that need help in return.’

In her free time, Abby loves hanging out with her Puggle, Goldendoodle, cat, and Leopard Gecko.

Maggie Lopez

Veterinary Assistant

About Maggie

Maggie Lopez is a Veterinary Assistant from Sioux City. She is a graduate of Western Iowa Tech Community College. Maggie loves being around animals and learning new things every step of the way. When away from work, she loves spending time with her son Leonardo and daughter Nayeli and cuddling with her many dogs. She is also happy to be married to her wonderful husband, Cesar.

Ethan Yoder

Veterinary Assistant

About Ethan

Ethan Yoder has been a Veterinary Assistant at Elk Creek Animal Hospital since 2015. He is a native of Sioux City, where he graduated from East High School. Ethan has a Bachelor’s Degree in cinema from the University of Iowa. His favorite thing about working at Elk Creek is getting the chance to help heal sick animals. In his spare time, Ethan enjoys hanging out with his cats and watching cheesy horror movies.

Emily Riedy

Veterinary Assistant

About Emily

Emily Riedy joined the Elk Creek team in August 2018. She was born and raised in Sioux City and currently lives in Sergeant Bluff with her fiance, Josh, and two children. She loves that every day at the clinic is different from the last, and she gets to see a fantastic variety of patients that come through the door. Emily was raised with lots of animals and couldn’t imagine her life without them!

Mandy Fletcher

Veterinary Assistant

About Mandy

Mandy has been at Elk Creek since May 2019. She is a veterinary assistant graduate from Western Iowa Tech Community College. Mandy has a passion for knowledge in anything animal-related. She grew up in a home with all types of critters, from reptiles and rodents to cats and dogs. Mandy has a soft spot for her four cats, five guinea pigs, and her border collie, Bender, with a dream to someday have horses in the country. She spends her downtime watching movies, listening to music, and playing video games.

Clay Kramper

Veterinary Assistant

About Clay

Clay was born and raised in Homer, NE. After graduating high school, he went to college at Wayne State University, where he received a Bachelor’s Degree in exercise science. A dedicated athlete his whole life, Clay set three different track and field records during his time at Wayne State, a fitting achievement considering his fitness passion.

Since a young age, Clay has also had a passion for animals, which eventually led him to work for us here at Elk Creek Animal Hospital starting in 2019. Clay has been an indispensable part of the Elk Creek family since the day he started. He is always there to anchor the rest of us and keep us motivated. If there is a stressful situation or a difficult case, Clay can maintain a positive attitude, and that positive attitude is always infectious.

Clay and his girlfriend, Melissa, have a rambunctious Alaskan Malamute named Layla that keeps them busy and entertained. When he’s not playing fetch with Layla, Clay likes to play the guitar, exercise, and spend time with his friends and family.

Lexie Schuster

Veterinary Assistant

About Lexie
Lexie Schuster has been a part of the Elk Creek family since April 2020. She grew up on a farm outside of Elk Creek, Nebraska. She has always had a passion for helping animals. She graduated with her bachelor’s in Animal Science from the University of Nebraska-Lincoln. In her free time, Lexie loves spending time with her dog Oakley, farm kitties, and two pygmy goats.

Kolbie Trudeau

Kennel Assistant

About Kolbie

Bio coming soon!

Carla Aguilera

Kennel Assistant

About Carla

Bio coming soon!

Raegan Modlin

Kennel Assistant

About Raegan

Bio coming soon!