Nassau Veterinary Specialists

Dr. Walker and his incredible team saved my Lola girl. I truly can not say enough wonderful things about Dr. Walker and his staff. Everyone was genuine, kind, caring, and compassionate. They kept me up to date during her hospitalization and did everything possible to provide her with the very best care. Never once did Dr. Walker rush through our calls or appointments. He explained everything carefully and in great detail, as did his nurse Jenn. I only wish I had found them sooner!

Our first encounter with Dr. Walker was after a late night emergency visit with our sweet girl Molly. She had been struggling to breathe and had fatigue we thought was from the summer heat. Likely heart failure. We needed a cardiologist. Fortunately, Nassau Vet Specialists had recently opened in our area. Our appointment was scheduled quickly. Dr. Walker examined Molly and was able to provide all testing immediately. He spent a lot of time explaining test results and treatment. He is kind, personable, caring and an expert in caring for dogs like Molly - with heart problems or those requiring complex care. The office is state of the art which is nice, but Dr. Walker and his staff are outstanding! Oh, and Molly has improved on her treatment so much you would think she was a pup again!

We cannot thank Dr. Walker, Dr. Linden and the entire team enough for their love, support and expertise in caring for our girl Valerie. Exceptional care, communication and follow-up exceeded our expectations. Thank you ALL for everything you did for our family!

We recently brought our cat to Nassau Veterinary Specialists for a procedure, and the entire experience was exceptional from start to finish. The staff was incredibly kind, patient, and reassuring — exactly what you hope for when trusting someone with your pet’s care. Everyone we interacted with was professional yet warm, making sure we understood each step of the process and that our cat was comfortable and well-looked-after. The level of efficiency and organization was impressive, but what truly stood out was the compassion they showed. It’s clear that they genuinely care about both the animals and the people who love them. We also appreciated that they accept Trupanion pet insurance, which made the process even smoother and less stressful. We are grateful for the excellent care our ca

Dr. Mark Walker and his care team are exceptional and I'm so grateful to them for all of their care and support over the past few months. After weeks of ongoing GI issues with my puppy and multiple vet visits elsewhere, Dr. Walker truly listened and took the time to understand the full history and everything we had been through and tried. He explained everything clearly without rushing or dismissing my concerns. The technicians and staff were equally compassionate and patient. I've been an emotional wreck during these issues but everyone has been so understanding. If your pet is dealing with chronic or complex GI issues that haven’t responded to standard treatment, reach out to Dr Walker. He really is the best. Words cannot adequately express my appreciation.