your home town Veterinarians
since 1957.
eMail | 773-478-1868 ph | 773-478-3837 fax | M-F: 9am - 6pm | SA: 9am - 2pm
Our Veterinarians.

Paul Fedyniak, DVM
Part-Owner, Veterinarian
Dr. Paul is the son of Dr. Mike. He grew up surrounded by dogs. He attended the University of Illinois at Urbana/Champaign for both his undergraduate and veterinary studies. Dr. Paul has worked at Mayfair Animal Clinic with his father, Dr. Mike, since he was 13 years old.
Dr. Paul enjoys the challenge of general practice and finds particular interest in working dogs. He has helped plan training sessions for Police K9 Handlers, and has even started his own Not-For-Profit Corporation, MEDIK9USA NFP INC, which donates canine medical supplies to police, EMS, and the military.
When not working, he enjoys painting and drawing, vintage cars, and outdoor activities, and spending time with his wife, Amanda, and new daughter, Ellie, as well as his German Shepherd, Otto, and French Bulldog, Olive Pickles.

Michael Fedyniak, DVM
Part-Owner, Retired Veterinarian
Dr. Mike is the son of Vladimir Fedyniak, DVM.
Dr. Mike graduated from Hannover’s School of Veterinary Medicine in 1975. He has been practicing since 1976.
He enjoys watching the Bears game with his French Bulldog and Pug (Louie and Chip), and spending time in Wisconsin where he can go boating and visit with his three grandchildren.

Katie Baldwin, DVM
Associate Veterinarian
Dr. Katie is originally from Chicago. She received a Bachelor’s Degree in Biology at Johns Hopkins in Baltimore in 1994 and her DVM in 1998 from the University of Illinois in Champaign-Urbana. She then completed an internship at a private specialty practice in Rochester, New York. Finished with her internship, she worked at Mayfair Animal Clinic from 1999-2006, before moving to London, where she worked for a few years doing relief work. Dr. Baldwin returned to the United States and practiced in Chicago for a few years before returning to Mayfair.
Dr Baldwin has a strong interest in preventative care and Fear-Free Visits, which is a program designed to make visits to the vet less scary.
Dr. Baldwin and her husband Warren (imported from England) and daughter Poppy live with their cats Logan and Wolfie, and dog, Nana, in Roger’s Park. In her free time, Dr. Baldwin likes to read, travel, and enjoy the outdoors.

Elizabeth Winkler, DVM
Associate Veterinarian
Dr. Elizabeth became interested in veterinary medicine at the age of five while growing up in Des Moines, Iowa. She attended Iowa State University, attaining a Bachelor of Science in Animal Ecology, followed by a Doctorate in Veterinary Medicine in 2012.
She enjoys all aspects of veterinary medicine, but has a special interest in soft tissue surgery, internal medicine, and the unique health challenges presented by her geriatric patients.
Dr. Elizabeth shares her home with two cats, Darwin and Pascal. In her free time she enjoys reading, baking, traveling, art, and exploring this amazing city she now calls home.

Samantha Hadley, DVM
Associate Veterinarian
Dr. Sam grew up in the Northwest Suburbs of Chicago. She attended Harper College for her associates degree, Northeastern Illinois University for her undergraduate, and University of Illinois Urbana/Champaign for her doctorate in Veterinary Medicine.
She enjoys general practice, and the variety of cases she is able to see on any given day. She has an interest in internal medicine and ultrasonography. She also enjoys dermatology and surgery. Prior to working at Mayfair, she worked at a walk-in clinic and another general practice in the Northwest suburbs.
In her free time, she enjoys spending time with her husband Jason, and their young son, Kover. She has four cats—Bitty, Hiccup, Blanca and Marty Moylan (yes, named after the Ilinois state representative), one French bulldog— Hazel aka “Miss Nut”, and a horse—Bryonie.

Marta Petryna, DVM
Part-Time Associate Veterinarian
Dr. Marta has been in practice for over 45 years, graduating from the University of Illinois College of Veterinary Medicine in 1979. She previously owned her own practice in the Ukrainian Village until 2005. She then worked part-time in the Northwest suburbs until she joined Mayfair’s team in 2025.
In her spare time, Dr. Marta enjoys traveling and spending time with her four daughters and grandchildren.
Our Support Staff
Jennifer Fedyniak, Office Administrator
Support Team:
- Tina, CVT
- Sue
- Richelle
- Miguel
- Angie
- Liz
- Renata
- Arely
- Edwin
- Berta
Vladimir Fedyniak, DVM
(02/21/1915 - 01/09/2003)
Dr. Vladimir Fedyniak was born in Ukraine in 1915. He moved to Germany, where he met his wife to be, Vera. Together, they moved to the United States. After several years of working as a veterinarian, Dr. Vladimir opened his own clinic in 1957, Mayfair Animal Clinic PC. Mayfair continues to be family owned and operated by the Fedyniaks to this day.




