South Putnam Animal Hospital

Meet Our Team

Our approach to veterinary care sets us apart from other practices in the area. While we provide top-quality clinical services and feline boarding accommodations in a modern facility, it's how we deliver care to you and your pet that's different. We view bedside manner as an integral component of superior service, and strive to offer plenty of love, cuddles, and warm welcomes during every visit.

Julie Fixman

DVM, DABVP, Medical Director, & Co-Owner

Dr. Julie Fixman earned her Doctor of Veterinary Medicine degree from Cornell University in 1998. Dr. Fixman is a compassionate and committed veterinarian, co-owner, and the Medical Director at South Putnam Animal Hospital.

Dr. Fixman became Board Certified by the American Board of Veterinary Practitioners in Canine and Feline Practice in 2007 after completing additional studies and examinations to achieve board certification. Her areas of professional interest include complex internal medicine conditions, soft-tissue surgery, and ultrasound. Dr. Fixman belongs to a number of professional organizations and is a former president of the Hudson Valley Veterinary Medical Society.

At home, Dr. Fixman's pets include Callie, a Golden Retriever, Spike, an Abyssinian cat, and an ever-changing number of chickens. She has a busy family life outside of the office with her husband, son, and daughter, and when she isn't inside an ice arena being a "hockey mom," she enjoys hiking, cooking, reading, skiing, and gardening.

Karen Pedevillano


South Putnam Animal Hospital is excited to have Dr. Karen Pedevillano join the team as an Associate Veterinarian. Dr. Pedevillano is a graduate of Penn State University, earning her bachelor's in Animal Biosciences, and earned her Doctorate in Veterinary Medicine at Ross University School of Veterinary Medicine in 2017. She attended Michigan State University for her clinical year, and her areas of professional interest include surgery, behavior, pain management, and exotic and wildlife species.

Dr. Pedevillano has worked in the veterinary industry since 2004 and was inspired to become a veterinarian by her deep love of animals, and the ability to educate and inspire people to love and care for them as well.

Originally from Poughkeepsie, NY, Dr. Pedevillano currently lives in Dutchess County, NY with her husband, Chuck, daughter, Olive, and son, Innocenzo. She also shares a home with her two pit bulls, Juba and Leela, and Chihuahua, Picasso. When she is not providing quality veterinary medicine, she enjoys exercising with her family and dogs, hiking, crocheting, and amateur carpentry. A fun fact about Dr. Pedevillano is that she was a zookeeper at Central Park Zoo for three years before going to vet school.

Jessica Hillyard


Dr. Jessica Hillyard is a Veterinarian at South Putnam Animal Hospital. She earned her Doctorate of Veterinary Medicine from the University of Minnesota College of Veterinary Medicine in 2013, and completed her undergrad degree from Northwestern University in 2005. Her areas of professional interest include surgery and oncology. Dr. Hillyard loves the human and animal bond, which inspired her to pursue a veterinary career back in 2007. She says the best part of working in the veterinary field is watching clients’ pets grow from puppies and kittens, to adults.

Originally from Oceanside, New York (Long Island), Dr. Hillyard currently lives with her spouse, Boxer, Steve, French Bulldog/Boston Terrier mix, Gizmo, Jack Russel Terrier, Bowser, cat, Trashy, and 9 hens. In her spare time she enjoys reading, doing yoga, and hanging out with her dogs. A fun fact about Dr. Hillyard is that she was an English major in college and has lived in four states, while practicing veterinary medicine in three of them!

Kathi Heiber

DVM & Co-Owner

Originally from Cleveland, Dr. Kathi Heiber earned her degree in veterinary medicine from the Ohio State University College of Veterinary Medicine in 1979. Her first few years in practice in Brewster, NY were spent treating companion pets as well as farm animals and horses.

In 1984, Drs. Heiber and Cindy Kosacz founded South Putnam Animal Hospital in its present location in Mahopac, NY. The hospital was built to provide a high standard of veterinary care that they would want for their friends and family to receive for their beloved pets. Providing owners with the best information to make care decisions for their pets has always been the hospital's goal.

Dr. Heiber is actively involved in the community, and presently serves on the Board of Directors for Cornell Cooperative Extension of Putnam County. She is also a leader with 4-H youth development programs that work with local youth interested in veterinary medicine. In addition, Dr. Heiber volunteers for AFS International Exchange Student Program welcoming students from foreign countries and supporting families who host students in their homes.

When Dr. Heiber is not practicing high-quality animal medicine or doing community service, you may find her riding her Arab Shagya mare, Lily. She also has a Jack Russell mix and two adopted cats. Dr. Heiber enjoys reading, swimming, yoga, and spending time with her husband, cooking through the seasons with fresh local produce, exploring new cuisines, and traveling.

Peggy Keating

Practice Manager

Peggy Keating joined our staff in 1990. She oversees a variety of functions necessary for hospital operation, makes sure the hospital runs smoothly, allowing veterinarians and staff to focus on the health of the animals. She has a Pitbull mix named Shelby, and two Domestic Shorthair cats named Walter and Mildred.



Jennifer Shea joined our staff in 1995. She currently has a Labrador Retriever mix named Maybelle and 4 domestic shorthair cats Randall, Pearl, Otis, and Baby Shark.



Jen Bernstein joined our staff in 1997.



Ann Clark joined us in 2014. She has two cats, a Domestic Shorthair named Shadow and Simba, and a 4-year-old Boxer mix named Meadow.



Molly McMahon joined our staff in 2019. She has a Goldendoodle named Buster and a Terrier mix named Brooklyn.



Irene Baier, LVT joined our staff in 1997. She has a Cockapoo named Peep.



Megan Sausedo, LVT originally joined our staff in 2003 as a Veterinary Assistant and is now one of our Licensed Veterinary Technicians. Megan is also our inventory manager and is responsible for managing the practice's medical inventory which is crucial to the smooth flow of client service and patient care. She has an Australian Cattle Dog mix named Kiwi.




Astri Teal, LVT originally joined our staff in 1996 as a Veterinary Assistant. After graduating from Mercy College, she received her Veterinary Technician License in 2001. She has three mixed-breed dogs, Rygg, Mesa, and Summit.



Lisa Forsythe-Kane, LVT joined our staff in 1996. She has a four terriers named Sprocket, Britt, Roo, & Biggie, and 10 felines of various breed, Race, Swish, Munson, Kraft, Felix, Shuster, Carmen, Davis, Gillette, and Sid aka Hairy Thursday.


Veterinary Assistant

Gina Guerreiri joined our staff in 2017. She has a Domestic Longhair Cat named Rizzo.


Veterinary Assistant

Andrea Jenkins joined our staff in 2018.


Veterinary Assistant

Gladys Taboado Toranzo joined our staff in 2019.


Veterinary Assistant

Annmarie joined our team in October 2020.


Veterinary Assistant

Julia joined the South Putnam team in August 2020.


Veterinary Assistant

Rachel joined the team in May 2019.


Hospital Cat

Vera is a hospital cat here at South Putnam. Make sure to say hi the next time you stop by!


Hospital Cat

Sonny is one of our hospital felines! Say hi the next time you are at the hospital.

Join the South Putnam Animal Hospital Family Today!

Located off of Route 6 and Route 6N, just minutes from Lake Mahopac and Mahopac High School.

Phone: 845.628.1834


  • Monday: 8:30 AM - 5:00 PM
  • Tuesday: 8:30 AM - 7:00 PM
  • Wednesday: 8:30 AM - 3:00 PM
  • Thursday: 8:30 AM - 5:00 PM
  • Friday: 8:30 AM - 5:00 PM
  • Saturday: 8:30 AM - 3:00 PM
  • Sunday: Closed