Welcome to Kohn Animal Hospital

Call us at (224) 261-8470

Welcome to Kohn Animal Hospital! We are a full service hospital treating dogs, cats, reptiles, rabbits, and other exotic pets. The original Kohn Animal Hospital was located in Highland Park, IL and was created by Dr. Leonard Kohn in the early 1950s. His granddaughter, Dr. Greta Mann, has revitalized the practice to follow in his footsteps. We value close relationships with our clients and take pride in our family-type atmosphere here at Kohn Animal Hospital. Our staff is excited for the opportunity to help you and your pets. 

We offer routine and emergency medical and surgical care to your pets. At Kohn Animal Hospital, we understand that pets are an important part of your family and we are dedicated to their care and treatment.We are happy to offer a number of resources that enable you to learn about how to take better care of your pets. Please feel free to browse our site to learn more about us and the services that we offer. We emphasize preventative care and wellness at our practice. If you have any questions, call (224) 261-8470 or contact us and we'll promptly get back to you. Our Northbrook veterinarian office is very easy to get to - just check out the map below! We also welcome you to subscribe to our newsletter, which is created especially for Northbrook pet owners.

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

Dr. Margaret Mann
Northbrook Veterinarian | Kohn Animal Hospital | (224) 261-8470

3113 Dundee Road
Northbrook, IL 60062

Meet Our Skilled Team

Learn Who We Are

  • Dr. Greta Mann
    Veterinarian/ Owner

    Dr. Greta Mann is the proud owner of Kohn Animal Hospital.She  completed her bachelor's degree in Molecular and Cellular Biology at Beloit College prior to obtaining her veterinary doctorate degree from the University of Illinois. Dr. Mann's special interests include dermatology, animal behavior, and client education.

    Read More
  • Danielle ‏‏‎ ‎

    My name is Danielle but most people call me Dani. I have been a vet tech for nearly 8 years. I am in the process of obtaining my bachelors degree in Biology from Northeastern University and am currently applying to veterinary schools. I live in Beach Park with my three wonderful pitties: Nalah, Ben, and Broccoli. In my free time I like to hang out with friends, read a book, and binge watch Netflix!

  • ​Dr.
    Colleen Mullen

    Dr. Colleen R. Mullen is grateful to be an associate veterinarian at Kohn Animal Hospital. With a Doctorate in Veterinary Medicine from St. George’s University and a Bachelor of Science in Animal Sciences from Purdue University, she brings a wealth of diverse knowledge and expertise. She has practiced in the Chicagoland area obtaining experience in small animal general practice and urgent care. Driven by her passion for integrative medicine, Dr. Mullen pursued additional training in Veterinary Acupuncture at the Chi Institute. She has taken courses in herbal medicine and is currently furthering her education in canine rehabilitation at Chi University, working towards certification. Her special interests lie in pain management, preventive, and geriatric medicine. Beyond her professional pursuits, Dr. Mullen enjoys immersing herself in music and attending concerts. Gardening allows her to connect with nature and nurture her green thumb. She finds balance by practicing yoga and spending time with her family. Dr. Mullen shares her life with her husband, three beloved cats (a Siamese and two tabbies), and a one-eyed rescued French Bulldog.

  • Michelle ‏‏‎ ‎

    I graduated from the Vet Tech Institute at Fox College in December 2021 with an Associates in Veterinary Technology. In my free time I like to spend time with my dog and mostly take naps together.

  • Madi
    Veterinary Technician

    Bio Coming Soon!

  • Jazmin
    Veterinary Technician

    Bio Coming Soon!

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Office Hours

Our Regular Schedule

Northbrook Office


8:00 am-6:00 pm


8:00 am-8:00 pm


8:00 am-6:00 pm


8:00 am-8:00 pm


8:00 am-6:00 pm