Meet Our Veterinarian

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. She is currently a member of the Chicago Veterinary Medical Association and the American Veterinary Medical Association. 

The original Kohn Animal Hospital was located in Highland Park, IL. It was created in the early 1950s by Dr. Mann's grandfather, Dr. Leonard Kohn. He practiced in the area for over thirty years. Dr. Mann grew up hearing tales of veterinary medicine from her grandfather and was inspired to follow his footsteps into a career in veterinary medicine.

Dr. Mann was raised in Vernon Hills and is excited to be returning to this local community. She currently resides in Wauconda with her husband, Brad, their twin daughters, their Persian cat, Henry, their French Brittany Spaniel, Leela, and their Bernese Mountain Dog, Bernie. In her free time, Dr. Mann enjoys running, cheering on the Cubs, and sweeping vast amounts of fur from her house.

Dr. Kathleen Keene


Dr. Kathleen Keene is excited to join the team at Kohn Animal Hospital! She completed her bachelor's degree in Wildlife Ecology and Communications from the University of Wisconsin-Madison before completing her veterinary education at University of Illinois. She always knew she wanted to be a veterinarian!

Dr. Keene's professional interests include preventative care, ophthalmology and dermatology. She is a member of the American Veterinary Medical Association along with the Chicago Veterinary Medical Association.

Dr. Keene grew up on the far southwest side of Chicago (yes, she is a White Sox fan, but still roots for the Cubs every once in a while). In her free time, she likes seeing live music and traveling to new cities. She is also an avid runner and foodie. She currently lives in Chicago with her fiancé and sweet pup Betty.

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Office Hours

Our Regular Schedule

Northbrook Office


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-6:00 pm


8:00 am-1:00 pm