Hospital Information

Meet Our Doctors

Portrait of Sarah Bernat, VMD

Sara Bernat, VMD

Medical Director,
Green Acres Veterinary Center
Dr. Bernat graduated with her VMD from The University of Pennsylvania School of Veterinary Medicine in 1998. Her professional interests include surgery, ultrasound, and internal medicine. She is a member of the AVMA (American Veterinary Medical Association), AAHA (American Animal Hospital Association), and the NYSVMS (New York State Medical Society).
Portrait of Corey Biesinger, DVM

Corey Biesinger, DVM

Dr. Biesinger began his veterinary career as a Veterinary Assistant here at Green Acres while pursuing his Pre-Veterinarian degree from Medaille College. He then graduated from The Ontario Veterinary College in 2013. He has assisted in spay/neuter clinics in India and Thailand and plans to return in the near future. Dr. Biesinger’s interests include ultrasound, radiology, and surgery.
Portrait of Samantha Harack, DVM

Samantha Harack, DVM

Dr. Harack is a Western NY native from North Tonawanda. She received her Bachelors of Science in Biology at Niagara University in 2015, and received her D.V.M from The Ohio State University in 2020. Her experience in school includes: completing a Business Minor at The Ohio State University Fisher College of Business, being a student ambassador for OSU, assisting in a spay/neuter trip to Costa Rica, and being a Hill’s Pet Nutrition Primary student representative. Dr. Harack’s medical interests include: oncology, soft tissue and orthopedic surgery, emergency and critical care. Her professional associations include being a member of AVMA, being fear free certified, and recover CPR certified. Dr. Harack’s personal interests include watching OSU football (Go Bucks!), and staying active in volleyball, softball, and snowboarding. She currently lives with her fiancé, Jeffrey and her 6 year-old Jack Russel Terrier Mix named Echo.
Paul Harper, DVM

Paul Harper, DVM

Green Acres Veterinary Center
Dr. Paul Harper was born and raised in Buffalo, NY.  He attended the Ohio State University for his undergraduate education and graduated from the Virginia-Maryland Regional College of Veterinary Medicine.  After graduation, Dr. Harper returned to the Buffalo-Niagara area to practice small animal medicine. He is a member of the American Veterinary Medical Association, the American Animal Hospital Association, the American Association of Feline Practitioners, Western New York Veterinary Medical Association, and the Niagara Veterinary Medical Association. His areas of interest include orthopedic surgery (fracture repair, TPLO, MPL, etc), soft tissue surgery, and emergency/critical care.
Dr. Cody Howard

Cody Howard, DVM

Green Acres Veterinary Center
Dr. Cody Howard was born in Salyersville, Kentucky, and is a graduate of Tuskegee University College of Veterinary Medicine. He obtained his bachelor’s degree from Morehead State University. His professional and medical interests are in leadership, emergency and critical care, surgery, and endoscopy. Dr. Howard enjoys going on adventures with his wife, daughter, and rescue dog Briar. He enjoys serving at his local Church, and he is an avid weightlifter and gamer. Proverbs 3:5-6
Dr. Jamie Rottstock

Jamie Rottstock, DVM

Dr. Rottstock is a graduate from Ross University School of Veterinary Medicine class of 2007. She completed her clinical studies at Louisiana State University and received a Bachelor’s in Science of Biology from the University of Puerto Rico. She has an interest in Emergency Medicine, Internal Medicine and Anesthesia. She is a member of the American Veterinary Medical Association and the NYS Veterinary Medical Society. She moved to Buffalo in 2018 with her husband and daughter accompanied by her rescue dog “Nietzsche” and cat “Baby Kitty”. She enjoys spending time with her family hiking, traveling and watching blockbusters.
Dr. Lindsey Tanalski

Lindsey Tanalski, DVM

Dr. Tanalski is originally from Long Island, NY but fell in love with western NY after attending the University at Buffalo where she received a degree in Biology with a minor in Medical Anthropology. She then received her D.V.M. from the University of Illinois Urbana-Champaign College of Veterinary Medicine in 2021. At Illinois, she worked with the resident wildlife animals, volunteered with the Veterinary Leadership Institute, and enjoyed outreach in the local community. Her veterinary interests include surgery, internal medicine, oncology, and pathology. She is a Fear Free certified professional, recover CPR certified, and a member of the AVMA.

Amanda Gerard, DVM

Dr. Gerard graduated from Dickinson College earning a Bachelor of Science in Biology and History. She then went on to earn her Doctor of Veterinary Medicine at Iowa State University in 2013. Upon graduation, Dr. Gerard completed an internship in Small Animal Medicine and Surgery at Iowa State and an Internal Medicine residency at the Atlantic Veterinary College (Prince Edward Island, Canada). She has previously worked in Massachusetts and Utah. She joins the Green acres family with years of experience in internal medicine, oncology, ultrasound, endoscopy, and computed tomography (CT).

Joshua Reeder DVM

Green Acres Veterinary Center
Originally from Lock Haven, Pennsylvania, Dr. Reeder went to Albright College for his Bachelor of Science degree. He then attended the Atlantic Veterinary College (PEI Canada) for his DVM. His professional interests include emergency/critical care and surgery. He has one dog, a 3 year old boxer named Phoenix.

Hung-Chun Lin, DVM

Green Acres Veterinary Center
Dr. Lin received a doctor of veterinary medicine degree from National Chiayi University, School of Veterinary Medicine in Taiwan. Following graduation, she completed a small animal rotating internship in National Taiwan University and earned a master’s degree at Purdue University. Dr. Lin then completed a clinical year at Louisiana State University and achieved her certification of the Program for the Assessment of Veterinary Education Equivalence (PAVE). Her professional interests include anesthesia and emergency medicine. When she is not working, she enjoys cooking, traveling, and playing badminton.

Derek Haley, DVM

Green Acres Veterinary Center
Dr. Derek Haley was raised in Fayetteville, Georgia. He received his Bachelor of Arts from Hampshire College in Massachusetts where he studied film and animal behavior. He then received his D.V.M. from the University of Georgia College of Veterinary Medicine in 2022. Dr. Haley’s professional interests include emergency/critical care, behavioral medicine, and soft tissue surgery. He is a Fear Free certified professional and a member of the AVMA. Dr. Haley’s personal interests include photography, sailing, and rock climbing. He also enjoys spending lots of time with his German Shepherd named Freja.

Kiera Moore, DVM

Green Acres Veterinary Center
Dr. Moore is from Ontario, Canada. She attended the University of Guelph and completed her bachelor’s degree in Animal Biology. She travelled to the Caribbean and received her Doctorate from Ross University School of Veterinary Medicine, and then completed her clinical year at Purdue University in Indiana. Buffalo allows her the opportunity to be close to family but also gain the most experience in emergency medicine. She is Fear Free Certified and Recover CPR certified. Her veterinary interests are emergency and shelter medicine. In her spare time, she enjoys traveling, marine wildlife, and spending time with her Australian shepherd.
portrait of Samantha Murray, VMD

Samantha Murray, VMD

VMD, DACVIM – Internal Medicine,
Green Acres Veterinary Center
Dr. Murray attended the University of Pennsylvania School of Veterinary Medicine, graduating in 2001. She received the Auxiliary to the Pennsylvania Veterinary Medical Association prize and the Small Animal Award. Dr. Murray completed her residency in small animal internal medicine at the Matthew J. Ryan Veterinary Hospital of the University of Pennsylvania from 2002-2004. She also completed a rotating internship in small animal medicine and surgery from 2001-2002. Dr. Murray is a member of the American College of Veterinary Internal Medicine and the American Veterinary Medical Association. Dr. Murray’s professional interests include hepatic disease, gastrointestinal disease, and immune-mediated disease. In her spare time, she enjoys running, cycling, and hiking, as well as spending time with her husband and children.
portrait of Shannon Palermo, VMD

Shannon Palermo, VMD

VMD, DACVIM – Internal Medicine,
Green Acres Veterinary Center
Dr. Shannon Palermo graduated Summa Cum Laude from the University of Pennsylvania School of Veterinary Medicine. Dr. Palermo completed her internal medicine residency at the Matthew J. Ryan Veterinary Hospital of the University of Pennsylvania. While in school, she was the president of the Penn Vet Shelter Medicine Club, where she was a recipient of the SVAVMA Community Outreach Excellence Award. Her volunteer work didn’t end there. She also worked with Hand2Paw, working with at-risk youth and shelter animals to help them see a better future. Dr. Palermo has been in the veterinary field for eight years, active both professionally and academically with several published articles to her name. Dr. Palermo also works with Mission Rabies, a non-profit organization committed to helping vaccinate dogs in parts of the world where Rabies is pervasive.

Hospital Tour

Hospital Policies


We offer a wide range of appointment times throughout the week, and on Saturdays to fit your schedule. Please call (716) 694-0122 to make appointments for all office visits. 

If your pet is experiencing a veterinary emergency there is no appointment required. Please visit our Emergency page for more information. 

For your convenience, we offer “drop-off” appointments. This means you have the option to bring your pet in at the time that works best for you, and leave him/her with us for a couple of hours. Once the doctor has examined your pet, you will receive a call to go over the exam findings. From that point we will organize a pick up time for your pet. 

For your protection and the safety of your pet and others, we require that all patients be placed on a leash, or contained in pet carriers. All pets are to be properly controlled while in the waiting room and the exam room.


Payment options for hospital services include Visa, MasterCard, Discover, American Express, and cash. 

We also accept CareCredit financing.


AAHA Accredited

Green Acres Animal Hospital is proudly accredited by the American Animal Hospital Association. Our animal hospital is among only 14% in the country who voluntarily go through a comprehensive, stringent evaluation every three years. We are evaluated on over 900 standards established to ensure our patients and clients receive the highest level of care. 

Accredited practices must meet specific standards in the following areas:
  • Anesthesia
  • Client Service
  • Contagious Disease
  • Dentistry
  • Diagnostic Imaging
  • Emergency/Urgent Care
  • Examination Room
  • Housekeeping
  • Human Resources
  • Laboratory
  • Medical Records
  • Pain Management
  • Patient Care
  • Pharmacy
  • Practice Leadership
  • Safety
  • Surgery

We were awarded this accreditation status because we provide high-quality pet care in a compassionate environment. Our standards are very high, and we are proud to offer this level of compassionate care to you. You can learn more about what our accreditation means for your pet family member at AAHA’s Healthy Pets website: Why Standards Are Important.

Our veterinarians are members of the Buffalo Academy of Veterinary Medicine, the New York State Veterinary Medical Society and the American Veterinary Medical Association. Buffalo Academy of Veterinary Medicine was organized in 1952 as a continuing education venture. Since then, the academy has been dedicated to educating members beyond the academic environment. Along with monthly meetings to continue education, we give our veterinarians time away from the practice to attend a national meeting to remain updated on the best medical practices for your pets.