Meet the Team

  • John Coyne, DVM Partner

    Dr. John Coyne has been practicing veterinary medicine for over 35 years. He was raised on a farm in Central Illinois and graduated from University of Illinois College of Veterinary Medicine in 1974. He is a big fan of University of Illinois athletics, and enjoys all Chicago sports. He and his wife Ruth have 2 daughters and 4 grandchildren.

  • Lynn Trudeau, DVM Partner

    Dr. Trudeau completed her undergraduate studies at William Woods College in Fulton, Missouri and received her DVM from the University of Illinois in 1990. She has been married for over 20 years and has two children. Her family also extends to her dogs, cats, horses, bird and fish. Horses are her passion and favorite past time outside of work and family.

  • Katrina Johnson, DVM Associate Veterinarian

    Dr. Katrina Johnson has been with FSAH since obtaining her DVM from the University of Illinois in 1994. While primarily small animal, Dr. Johnson has a special interest in exotic pets. She has been married for 10 years and has 2 children and 4 stepchildren. the family shares an array of pets including their 18yr old leopard gecko. In her free time, Dr. Johnson enjoys jogging, playing the guitar and singing with her church choir.

  • Petar Petrov, DVM Associate Veterinarian

    Dr. Petrov was raised in a small town in Bulgaria. He received his DVM in 2000 from Tracian University. Dr. Petrov practiced veterinary medicine in his home country, focusing on internal medicine and surgery. He mainly provides specialty serivices in orthopedic and soft tissue surgery. Dr. Petrov has been married for over 4 years and has two children. He enjoys spending time with family and friends, traveling and skiing.

  • Nick Velkov, DVM Associate Veterinarian

    Dr. Velkov, or Dr. Nick as he likes to be called, is from the town of Plovdiv, Bulgaria. He received his DVM from Tracian University in 2003. He has many special interests including abdominal, thoracic and orthopedic surgery, endoscopy and ultrasonography. Outside of FSAH, he has been married for nine years and has two children and a cat. He enjoys watching sports, cooking and collecting wine bottles from around the world.

  • Justine Siegfried, DVM Associate Veterinarian

    Dr. Justine Siegfried is originally from Long Island, NY. After receiving her B.S. in Small Animal Science from Delaware Valley College in Doylestown, PA, she went on to complete her DVM degree at Purdue University in 2012. Her medical interests include dentistry, radiology, and internal medicine. She currently lives with her toy poodle named Hudson, and in her spare time, she enjoys all things outdoors and exploring new places, especially Chicago!

  • Caitlin Neu, DVM Associate Veterinarian

    Dr. Caitlin Neu is from Lemont, IL. She received her B.S. in biology with minors in chemistry and criminal justice in 2007 and her DVM in 2012 from University of Illinois. She is currently working toward a masters degree in public health and certificate in veterinary forensics. She is interested in ophthalmology, dentistry, and exotic animal medicine. In her spare time, she enjoys White Sox games, traveling, team trivia, and spending time with her cat, TirNaNog, coonhound, Conan, and bearded dragon, Chloe.

  • Sara Hermanson, DVM Associate Veterinarian

    Dr. Sara Hermanson grew up in Beecher, IL. She has worked for Dr. Coyne since 2008. She received a B.A. in biology with a chemistry minor from Blackburn College and graduated with her DVM in 2014 from the University of Illinois. Her medical interests include dermatology, pain management, and dentistry. In her spare time, she enjoys running with her dog, Bitsy, being outdoors, and spending time with her family.

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Contact Us

  • Address: 24341 Western avenue, University Park, IL 60484

  • Phone: (708) 672-6166

  • Email: Contact Us