Veterinarians
Meet the Vets at Croton Animal Hospital
Mark Gustavson, DVM
Dr. Mark Gustavson received his Bachelor of Arts degree in Biology with a minor in Classical Studies from Drew University in 1995. He earned his Doctor of Veterinary Medicine degree from the New York State College of Veterinary Medicine at Cornell University in 2012. He completed a post-doctoral internship in Small Animal Medicine and Surgery at Ocean State Veterinary Specialists in East Greenwich, Rhode Island. The internship, focused on Small Animal Emergency Medicine and Surgery, including training in Emergency and Critical Care Medicine, Internal Medicine and Surgery. The internship also featured substantial time spent with board certified specialists in Cardiology, Neurology, Radiology, Exotic Animal Medicine, Dermatology, Ophthalmology, Oncology and Clinical Pathology.
After the internship was completed in 2013, he started working full-time at Croton Animal Hospital and has been the owner of the practice since February 2025. Dr. Gustavson is especially interested in Neurology and Clinical Pathology. He also enjoys working with Exotic Species such as pocket pets and has special interests and training in aquatic animal medicine, having completed the AquaVet Program in 2010.
In his spare time, Dr. Gustavson enjoys spending time with his lovely wife, Dr. Rachel Albert, also a local small animal veterinarian, their two daughters Vivian and Piper, and their dog Hugo. And on a fun note he builds his own lightsabers and Drones.
Bruce Hoskins, DVM
Dr. Bruce Hoskins received his Bachelor of Science degree from Cornell University in 1983. He earned his Doctor of Veterinary Medicine degree from the New York State College of Veterinary Medicine at Cornell University in 1989. He has been in companion animal practice continuously since that time. Dr. Hoskins owned Croton Animal Hospital from 2000-2025, selling the practice to D. Gustavson in 2025. He continues to be an integral part of the practice. Dr. Hoskins is a member of the American Veterinary Medical Association and its local chapter.
He is a member of the American Animal Hospital Association (AAHA), and the Croton Animal Hospital has been an AAHA accredited veterinary hospital since 1974. Dr. Hoskins is accredited by the USDA to perform regulatory work and international health certificate examinations on behalf of the agency.
In addition to writing an article for the Tufts University Veterinary College newsletter, Dr. Hoskins was lead author of an article published in the Journal of the American Veterinary Medical Association titled, “Ultrasonographic Diagnosis of Detached Retina in a Dog.” Dr. Hoskins was voted a "Best Vet" by Westchester Magazine and his peers for all years surveyed.
Dr. Hoskins shares his life with his wife, three sons, his dog named Freddy and cat named Jasper He enjoys the outdoors by skiing, boating, kayaking/canoeing, paddle boarding, swimming, and hiking.
Carol Popolow Abraham, DVM
Dr. Carol Popolow completed her Doctor of Veterinary Medicine degree at the New York State of College of Veterinary Medicine at Cornell University in 1989. Her post- doctoral internship in Small Animal Medicine and Surgery was completed in 1990 at the Oradell Animal Hospital in New Jersey. Dr. Popolow has been with Croton Animal Hospital since 1999.
Dr. Popolow is a member of the American Veterinary Medical Association, the New York State Veterinary Medical Association, the Westchester-Rockland Veterinary Medical Association. Dr. Popolow has been consulted for and quoted in several publications including Cat Fancy Magazine, DVM magazine, The Philadelphia Times, and the CBS Evening News.
When not at the hospital, Dr. Popolow likes to spend time with her husband, two children, dog and cat. She also devotes her free time to volunteering in the community and participating in “Citizen Science research projects” including Project Freederwatch.
