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Serving Hillside Pets
Since 1955

Meet Our Staff


Dr. Christina Mozdzierz

Christina Mozdzierz

Graduated from Michigan State University College of Veterinary Medicine in 2005. After receiving her DVM degree, she pursued an internship to further advance her training in domestic animal medicine and surgery, which she completed in 2006. She has since practiced in New York and Washington DC, before relocating to the Chicago area with her husband. She joined Hillchester Animal Hospital in November 2014.

While Dr. Mozdzierz enjoys all aspects of veterinary medicine, she has a particular passion for feline medicine, internal medicine and preventative care. She has been a member of the American Veterinary Association and American Association of Feline Practitioners since 2005 and actively participates in continuing education courses and seminars.

In her free time, she loves spending time with her husband and their two adorable daughters. Since relocating to Chicago, she has enjoyed exploring the theater, museums, restaurants and all the city has to offer. While she has had cats and dogs all of her life, her dear cat, Buttons, has been her close companion since veterinary school.

Dr. Sarah Child

Sarah  Child

Dr. Child received her degree from Michigan State University College of Veterinary Medicine in 1999 and joined Hillchester Animal Hospital in 2011. Dr. Child has both general and emergency medicine experience, and enjoys promoting lifelong wellness in her patients.  

When she is not at work, Dr. Child enjoys spending time with her husband and 2 children Ellie and Max, hiking and walking outdoors, reading, and is currently learning to play the guitar. Dr. Child also enjoys spending time with her mixed breed dog, Howard. 




Veterinary Staff

Practice Manager


Crystal Tylin is the new Practice Manager at Hillchester Animal Hospital.  She has been working in the Veterinary Field for the past 3 years as a Veterinary Technician but has recently taken on the challenging role of practice manager.   She graduated from North Central College with a degree in Organizational Communication in 2013 and has been working in Animal Hospitals ever since.  As the practice manager, Crystal really takes pride in the high quality medical and preventative care that is given by the caring Veterinary Associates at this practice.  She married her husband in 2015 and together they have 3 beautiful cats; Cubbie, Hossa and Creeper, and a very rambunctious St. Bernard dog named Ryno!  Crystal is passionate about Preventative Medicine and goes above and beyond to ensure your fur babies are well taken care of!

Pet Care & Housekeeping


Katheryn started at Hillchester in August 2007. She is a graduate of York High School and lives in Elmhurst.

Kathryn loves animals and has three miniature poodles, Buddie, Bopper, and Buster. She also has a guinea pig named Stuart. She enjoys cooking, knitting, scrapbooking, mosaics, and horseback riding.

HAH Hospital Cats



Isabella is a domestic shorthaired cat, mostly black with just a little white on her chest. Her most striking feature is her big green eyes. She may have been born in 2005, arriving at Hillchester in 2010. Found by herself in an empty home that had been broken into, it was not clear if she was abandoned or if she took up residence in the home once she had an easy access, due to the break-in.

Isabella is a very affectionate cat, but shy in new surroundings. For several years, she just hung out with the staff in the back and our clients never had a chance to meet her. Just recently, she has started to venture up front and, within a short time, has become our second greeter at the front desk. She has become quite bold and at times has been spotted sitting on the seat next to clients, demanding attention and a lot of petting.