Internal Medicine For Small Animals

Internal Medicine is accessible for case consultation and updates 6 days a week. This ensures that all hospitalized pets receive seamless monitoring and care. Our internal medicine specialists have advanced knowledge of small animal gastroenterology, endocrinology, immune-mediated and infectious disease, diseases of the kidney and lower urinary tract as well as respiratory disease. Our internists provide a continuum of care for both inpatients and outpatients, working closely with you and your referring veterinarian.

Dr. Leyenda Harley, DVM,DACVIM, Director of Internal Medicine at Central Hospital For Veterinary Medicine.

Dr. Harley received her undergraduate degree from the University of Alaska Fairbanks and graduated from Tufts University School of Veterinary Medicine in 2004. She completed a rotating internship in small animal medicine and surgery in Norwalk, Connecticut and went on to do a residency in small animal internal medicine at the Animal Medical Center in Manhattan. She stayed on at AMC as staff in Internal Medicine and was co-director of post-graduate education and the internship program. She is a Diplomate of the American College of Veterinary Internal Medicine and sees patients by appointment. Ask your veterinarian for a referral.

Dr. Eric de Madron,DMV,DACVIM (cardiology),DECVIM(internal medicine)

Dr. Eric de Madron is a Diplomate of the American College of Veterinary Internal Medicine in Cardiology and the European College of Veterinary Internal Medicine in Internal Medicine. Dr. de Madron has extensive expertise in interventional cardiology (pacemakers, balloon valvulopasties and trans-catheter PDA occlusions), and interventional radiology (placement of tracheal stents for the palliative treatment of tracheal collapse). Dr. de Madron began his North American career as a cardiologist / internist at the DMV Veterinary Centre in Montreal, Quebec, then continued in Ottawa, Ontario, at the Alta Vista Animal Hospital for 16 years. His main clinical interests are prevention and management of congestive heart failure,management of systemic hypertension, interventional cardiology and radiology (with a special interest for tracheal collapse in dogs)

Dr. Elizabeth Settles, JD, DVM, DACVIM (SAIM) (Internal medicine)

Dr. Elizabeth Settles attended the University of Kentucky from 1982-1986 where she studied Microbiology and Music Performance. She received her Doctor of Veterinary Medicine Degree from Auburn University in 1990 and completed a small animal medicine and surgery internship at the University of Missouri from 1990-1991. Dr. Settles then completed a dual residency in Cardiology and Internal Medicine at Missouri from 1991-1994. She became board certified by the American College of Veterinary Internal Medicine in Small Animal Internal Medicine and has also completed advanced training in Pharmacology and Immunology. She moved to the San Francisco Bay Area in 1994 where she practiced cardiology, internal medicine and emergency medicine in private practice for 10 years. In 1999 she began attending the University of San Francisco School of Law. She graduated with her JD and a certificate in Intellectual Property and Internet Technology Law in 2002. From 2004-2006 she worked as an internal medicine consultant with a large regional veterinary diagnostic laboratory. She was associate editor of the American Veterinary Medical Law Association Newsletter for many years and a member of the board of the AVMLA. She is a Past-President of the AVMLA as well as the ACVIM Foundation Board and a past member of the AKC Foundation Board. For the past year she has been teaching Internal Medicine and Veterinary Law at Ross University School of Veterinary Medicine in St Kitts and providing Internal Medicine Telemedicine Services to Special Veterinary Services in Reno, NV. Dr. Settles has a broad range of practice experience and ultrasound and endoscopy skills. She is excited to be here in Connecticut to join the new practice in Guilford. Her 2 Sphynx cats were sad to leave the Caribbean, but her 2 English Bulldogs could not be happier!

Agnieszka Borowski BS, LVT

Agnieszka graduated from Mercy College in Dobbs Ferry, NY in 1999 with a BS of Science (Specialty Veterinary Technology). She worked for 10 years at Just Cats Veterinary Hospital as a head technician and technical staff supervisor before moving to VCA Shoreline as an ICU technician and later becoming the Internal Medicine Technician. Agnes landed at Central Hospital in November 2016 as the lead technician in the internal medicine department.

Mandy Tsang, CVT

Mandy graduated from Mount Ida College in 2010 with a Bachelor of Science in Veterinary Technology. She began working as a technician at Central Hospital in 2011. She left for a short period of time to gain experience at another practice and returned to Central in 2014. Mandy is actively involved in both our Dermatology Department and Internal Medicine Department.

Fill and submit our internal medicine referral form here



  • Endoscopy including: Upper and Lower Gastrointestinal, Nasopharyngeal, Lower Respiratory, Urogenital, and Bronchoscopy
  • i131 Radioactive Iodine Therapy for Cats with Hyperthyroidism
  • Partial Parenteral Nutrition
  • Bone Marrow Aspiration and Core Biopsy
  • Tracheal Wash and Bronchoalveolar Lavage, Tracheal Stenting
  • Thoracocentesis, Abdomenocentesis, Arthrocentesis
  • Therapeutic Endoscopy including; Foreign Body Retrieval, Esophageal Balloon Procedures
  • Feeding Tube Placement (PEG, Esophagostomy, NE/NG Tube
  • Blood Component Transfusion Therapy
  • Blood Pressure Monitoring (Direct and Indirect)
  • Stem Cell Therapy for the treatment of inflammatory or immune mediated disease such as : Asthma, Inflammatory Bowel Disease, Hepatitis and Osteoarthritis.