Chicago Cat Clinic

Meet Our Team

We look forward to seeing you soon! Your cat will be surrounded by a kind, devoted team of professionals who have devoted their careers to felines.

Get to Know Our Team!

Your feline’s health and well-being are our top priority. We understand and respect the extraordinary bond between you and your cat and strive to provide the highest-devoted quality wellness care. At Chicago Cat Clinic, your cat will be surrounded by a kind, devoted team of professionals who have devoted our entire veterinary careers to felines.

Since cats outnumber dogs in the U.S., we think our feline-only clinic is a perfect solution to the stress and anxiety that dogs and other animals can induce during a joint veterinary visit. We are happy to address questions or concerns and will be honored to care for your feline. Book an appointment online or call us today!

Our Devoted Doctors

Dr. Larissa Olenych


Dr. Olenych joined the Chicago Cat Clinic in July 2004. She was born and raised in Chicago, received her undergraduate and veterinary degrees from the University of Illinois, and has been in practice for 35 years. She is married and has a daughter and a son. She enjoys interacting with her clients and their cats and is a very caring practitioner. Dr. Larissa – as she prefers to be called – constantly tries to see the best in everyone. Her hobbies include crafting, embroidery and reading. She is a welcome asset to our staff.

Dr. Jillian Juna


Dr. Juna joined the Chicago Cat Clinic in July 2021. She graduated from the University of Illinois with a Bachelor of Animal Sciences in 2012 and a Doctor of Veterinary Medicine in 2016. Dr. Juna is a member of AVMA and ISVMA. Dr. Juna strongly emphasizes client communication and a high standard of care for her patients.

Dr. Patrick Frenzer


Dr. Patrick Frenzer joined the Chicago Cat Clinic in August 2023. He grew up in Edgebrook before traveling to the University of Florida for college. There, he received a Bachelor’s and Master’s in Materials Engineering before making the switch to Veterinary Medicine. Dr. Patrick graduated with his Doctorate of Veterinary Medicine from the University of Florida in 2018, after which he completed a year-long rotating internship at a specialty hospital in Long Island. He practiced for several years in the Tampa, FL, area before returning home to Chicago.

 He has a special interest in veterinary behavior and prides himself on client education and low-stress handling. Outside of work, Dr. Patrick enjoys playing video and board games, watching horror movies, and spoiling the family gray-muzzle doggo Seamus (and his niece and nephew Goldendoodles).

Our Staff
Courtney, Practice Manager

My name is Courtney. I’ve been working in Veterinary Medicine for 27 years. I have been a technician at the Chicago Cat Clinic for 23 years.

Pat, Vet Staff

Hi my name is Pat, and I have been at the clinic since 1980 and am currently the practice manager.

Roxanne, Veterinary Tech/Assistant

Hi, my name is Roxanne and I’ve worked in the veterinary field for eleven years. I have worked in many different aspects of veterinary medicine, from a small practice to shelter medicine to an emergency room. I have been at Chicago Cat Clinic for five years and I love every minute of it.

Maddy, Veterinary Tech/Assistant

Hi, my name is Maddy, and I’m fairly new to The Chicago Cat Clinic. I’m currently studying to become a certified vet tech.

Nicci, Veterinary Tech/Assistant

My name is Nicci. I’ve been a veterinary technician for 18 years. I initially worked with the Chicago Cat Clinic from 2003-2008 and I am very excited to be back!

Caitlyn, Client Service Rep.

Hi, my name is Caitlyn. I have worked with cats for over six years and have been with the clinic since January 2021.

Danielle, Client Service Rep.

Hi, my name is Danielle. I’m one of the newest additions to the clinic and started in the summer of 2021. I’m excited to work with animals as my childhood self had always wanted.

Alejandra, Client Service Rep.

Hi, my name is Alejandra. I have worked in the animal field for six years and have been with the clinic since 2020.