BluePearl Pet Hospital
Northfield, IL
Our Vets

Dr. Ashley Ayoob-Wagner is especially interested in infectious diseases, sepsis and shock, transfusion medicine and disorders of coagulation. She has authored internationally published scientific articles in these fields.

• Diplomate, American College of Veterinary Emergency & Critical Care
• Diplomate, American College of Veterinary Internal Medicine (Small Animal Internal Medicine)
• Residency, Small Animal Emergency & Critical Care, Animal Medical Center, New York City
• Residency, Small Animal Internal Medicine, Animal Medical Center, New York City
• Internship, Small Animal Medicine & Surgery, The Ohio State University, Columbus
• Doctor of Veterinary Medicine, University of Georgia, Athens
• Bachelor of Science, Agriculture, University of Georgia, Athens

Dr. Ayoob-Wagner enjoys yoga, horseback riding (hunter/jumper) and Pilates. She is an avid reader, always with a good book in her hand, and can often be found getting lost in a bookstore. She enjoys spending time with her husband as well as their crew of rescue animals.

Dr. Pedro Boria completed residencies in both internal medicine and oncology, and he enjoys all aspects of oncology.

• Diplomate, American College of Veterinary Internal Medicine (Oncology)
• Master of Science, Veterinary Clinical Sciences, Purdue University, West Lafayette, IN
• Residency, Oncology, Purdue University, West Lafayette, IN
• Residency, Small Animal Internal Medicine, Tufts University, North Grafton, MA
• Internship, Small Animal Medicine & Surgery, Virginia-Maryland Regional College, Blacksburg, VA
• Doctor of Veterinary Medicine, Tuskegee University, AL
• Bachelor of Science, Animal Science & Biology, Kansas State University, Manhattan
• Bachelor of Science, Natural Science, University of Puerto Rico, Humacao

A sports fan, Dr. Boria especially likes playing golf and scuba diving. He also enjoys spending time with his wife and two kids.

Dr. Durmin is part of our emergency medicine training program for clinicians. He finds wound repair, toxicology and treating gastrointestinal disorders especially rewarding.

• Doctor of Veterinary Medicine, University of Minnesota, St. Paul
• Bachelor of Arts, Cultural Studies and Comparative Literature, University of Minnesota, Minneapolis

When not at the hospital, Dr. Durmin enjoys weight training, hiking, cross-country skiing, trying new recipes and comics art. He and his wife are kept busy with the antics of their three fluffy cats.

Dr. Breanna Erwin-Cohen finds kidney disease, toxicities and foreign body ingestions the most gratifying to treat.

• Internship, Oncology, BluePearl Pet Hospital, Chicago, IL
• Internship, Small Animal Medicine & Surgery, BluePearl Pet Hospital, Chicago, IL
• Doctor of Veterinary Medicine, University of Missouri, Columbia
• Bachelor of Arts, Zoology, Miami University, Oxford, OH

Dr. Erwin-Cohen has a husband, two sons and a golden retriever named Martin. They love to hike, go to the zoo and do tons of reading.

Dr. Ross Feldgreber enjoys all aspects of cardiology, especially working with pet owners to help them understand their pet’s condition. His particular clinical interests include interventional procedures for congenital heart disease, which is a disease a pet is born with, treating congestive heart failure, and diagnosing and treating arrhythmias, or irregular heartbeats.

• Diplomate, American College of Veterinary Internal Medicine (Cardiology)
• Residency, Cardiology, Red Bank Veterinary Hospital, Tinton Falls, NJ
• Internship, Cardiology, Red Bank Veterinary Hospital, Tinton Falls, NJ
• Internship, Small Animal Medicine & Surgery, BluePearl Veterinary Partners, Northfield, IL
• Doctor of Veterinary Medicine, University of Illinois, Urbana-Champaign
• Bachelor of Science, Psychology, University of Miami, FL

Dr. Feldgreber is married and has one daughter. Outside of work, he enjoys spending time with family and friends, watching and playing sports, exercising, exploring new places, and playing with his sheepadoodle, Harvey.

Dr. William Fischbach enjoys all aspects of emergency medicine and has special interests in emergency surgery and trauma.

• Internship, Sonora Veterinary Specialists, Phoenix, AZ
• Doctor of Veterinary Medicine, The Ohio State University, Columbus
• Master of Science, The Ohio State University, Columbus

Dr. Fischbach enjoys golf, traveling and spending time with his wife and daughter.

Dr. Emily Harison enjoys the challenges of complicated internal medicine cases and long-term care in chronic illnesses. She is most interested in immune-mediated disease, hematology, kidney disease, gastrointestinal and endocrine diseases. Dr. Harison loves performing diagnostic and therapeutic procedures including endoscopy and ultrasound.

• Diplomate, American College of Veterinary Internal Medicine
• Residency, Internal Medicine, Animal Medical Center, New York City
• Internship, Small Animal Medicine & Surgery, Mission MedVet, Kansas City, KS
• Doctor of Veterinary Medicine, Oklahoma State University, Stillwater
• Bachelor of Science, Oklahoma State University, Stillwater

Dr. Harison enjoys hunter jumper equestrian sports with her horse Olive. She also enjoys yoga, outdoor activities and live music. Her pets include pit bull mix Piglet, Boston terrier Finn, and cat Simon.

Dedicated to providing the best possible care, Dr. Todd Horowitz is particularly interested in treating diabetic ketoacidosis, gastrointestinal emergencies and trauma patients. He also finds pain management extremely important.

• Internship, Animal Specialty and Emergency Center, Los Angeles, CA
• Doctor of Veterinary Medicine, University of Illinois, Urbana-Champaign
• Bachelor of Veterinary Science, University of Illinois, Urbana-Champaign
• Bachelor of Science, Human Biology, Michigan State University, East Lansing

Outside of work, Dr. Horowitz is an avid sports fan, especially the Michigan State Spartans and all teams from Detroit. He also enjoys reading spy novels, travel and outdoors activities. He is married and has two children, a dog and two cats.

Dr. Hsieh has a special interest in wound management and surgery.

• Internship, Surgery, VCA Veterinary Referral and Emergency Center, Connecticut
• Internship, Small Animal Medicine & Surgery, Carolina Veterinary Specialists, North Carolina
• Doctor of Veterinary Medicine, University of Georgia, Athens
• Bachelor of Science, University of Georgia, Athens

Dr. Hsieh enjoys traveling and trying out different ethnic cuisines. You can often find her at the park or coffee shop, with book in hand, if she’s not busy cheering for her beloved football team, the Georgia Bulldogs

Dr. Linda Hyatt’s special interests include neurosurgery and infectious diseases of the central nervous system.

Visit our spotlight on Dr. Hyatt to learn more about the equipment she uses and how our Northfield hospital team works together to deliver compassionate neurology care to pets in the community.

• Diplomate, American College of Veterinary Internal Medicine (Neurology)
• Residency, Neurology & Neurosurgery, University of Tennessee, Knoxville
• Internship, Small Animal Medicine & Surgery, University of Tennessee, Knoxville
• Doctor of Veterinary Medicine, Colorado State University, Fort Collins
• Bachelor of Arts, Biological Sciences, Connecticut College, New London

Dr. Hyatt is married to her vet school sweetheart. In her spare time, she enjoys traveling, cooking and mixology, crafts, DIY home improvements, spending time outside (hiking, kayaking, snorkeling), and snuggling her rescue dogs (unfortunately her rescue turtle isn’t much of a cuddler.)

Publications & Articles

Dr. Rachel Katz is part of our emergency medicine training program for clinicians. She is particularly interested in treating toxin exposure, endocrine emergencies and feline emergencies.

• Doctor of Veterinary Medicine, University of Pennsylvania, Philadelphia
• Bachelor of Science, Psychology, Anthropology, Tulane University, New Orleans, LA

Appropriately enough, Dr. Katz has three cats: Wash, Mal and Tchoupitoulas. Her hobbies include running, reading and Netflix marathons.

• Doctor of Veterinary Medicine, Cornell University, Ithaca, NY
• Bachelor of Science, Biology, Northeastern University, Boston, MA

• Doctor of Veterinary Medicine, Western University of Health Sciences, Pomona, CA
• Bachelor of Science, Biology, University of Kentucky, Lexington

Dr. Desire’ Shradnick is part of our emergency medicine training program for clinicians. She is both FAST Ultrasound and Fear Free certified. Dr. Shradnick is passionate about emergency medicine because she thrives on helping people during stressful situations.

• Clinical Rotation, University of Illinois, Champagne-Urbana
• Doctor of Veterinary Medicine, Ross University, St. Kitts & Nevis, West Indies
• Bachelor of Science, Biology, Missouri State University, Springfield

In addition to reading, Dr. Shradnick enjoys hiking and exploring new restaurants with her best friend and canine companion, Bear.

Dr. Maryanne Theyerl’s special interests include cytology and hematology. She enjoys working with geriatric animals with a focus on improving quality of life.

• Doctor of Veterinary Medicine, University of Minnesota, Minneapolis
• Bachelor of Science, Biology, Bethel University, St. Paul, MN

Dr. Theyerl enjoys cooking, sailing, travel and trivia. She also brews her own beer. Her two boys are grown, but she lives with the world’s most beautiful beagle, Beaufort.

Dr. David Wilson has participated in clinical and basic research earning multiple awards in the areas of fracture traumatology, minimally invasive treatment of canine disorders, angular limb deformities and treatment of upper airway disease. His surgical interests include minimally invasive techniques laparoscopy, thoracoscopy, arthroscopy and minimally invasive fracture fixation, cardiothoracic procedures, surgical oncology, surgical therapy of elbow dysplasia, treatment of cranial cruciate ligament disease and fracture traumatology. In addition, he has a special interest in bracing and prosthetic solutions for the primary or supplemental treatment of an assortment of orthopedic conditions. Dr. Wilson also enjoys working closely with patients in post-surgical rehabilitation.

• Diplomate, American College of Veterinary Surgeons-Small Animal
• Residency, Small Animal Surgery, Colorado State University, Fort Collins
• Internship, Small Animal Medicine & Surgery, Colorado State University, Fort Collins
• Doctor of Veterinary Medicine, Iowa State University, Ames
• Bachelor of Science, Iowa State University, Ames

Dr. Wilson enjoys traveling, scuba diving, running, swimming, supporting the Chicago sports teams, wine collecting and exploring all the great things the city has to offer.

Dr. Jordan Yesesky is particularly interested in surgery and emergency stabilization.

• Internship, Small Animal Surgery, BluePearl Veterinary Partners, Michigan
• Internship, Small Animal Medicine & Surgery, BluePearl Veterinary Partners, Michigan
• Doctor of Veterinary Medicine, Iowa State University, Ames
• Bachelor of Science, Biology, University of Findlay, Ohio

Dr. Yesesky and his lab mix, Fitz, can often be found at the park playing with a tennis ball or walking around the city exploring. Kipper Noodleman Snugglesworth, III is the cat in the family. Dr. Yesesky, Fitz and Kip like to curl up on the couch reading a book or watching cooking shows.

Dr. Ginny Youn is particularly interested in treating acute trauma and injury cases, endocrine diseases and shelter medicine.

• Doctor of Veterinary Medicine, University of Illinois, Urbana-Champaign
• Bachelor of Science, Animal Sciences, University of Illinois, Urbana-Champaign

Dr. Youn enjoys watching movies, anime, and Korean TV shows with her husband. Their three Pomeranian mixes – Chewy, Pomie and Teddy – keep them busy! In her time off, she volunteers at local animal shelters.