Dr. Susan Welsch

Allendale Veterinary Hospital - Dr Susan Welsch

Dr. Susan Welsch established the Allendale Veterinary Hospital in 2004.  She earned her BS from Rutgers University in 1986, summa cum laude. She was accepted at Cornell University College of Veterinary Medicine and was awarded her DVM in 1991.  Dr. Welsch did her internship at the Animal Medical Center in NYC and has practiced small animal medicine in central NJ, Boston, and Ramsey NJ prior to her establishing Allendale Veterinary.

Dr Welsch brings over 25 years of practice expertise and knowledge to Allendale Veterinary. In addition to general medicine,  Dr. Welsch has a special interest in  canine and feline ophthalmology. 

Dr. Welsch and her husband John live in Rockland County with their two German Wirehaired  pointers, Abby and Emmy Lou.  When not at the hospital, you can find them hiking the Appalachian Trail and boating on the Hudson River.  

Dr. Teresa Izar

Allendale Veterinary Hospital - Dr Teresa Izar

At an early age, Dr. Teresa Izar spent 9 years exploring and discovering all of the different animals that lived in the jungles of the Sierra Leone, Africa. Her childhood experience never left her. When she returned back to the United States, she attended Sul Ross State University, then earned her DVM  from Texas A&M University in 2004. 

Dr. Izar first practiced medicine in Dallas, TX. After meeting her husband there, they relocated to his hometown of Ridgewood, NJ.  Dr Izar has a special interest in canine and feline dentistry.  She has advanced training in oral surgery and dental crown procedures which can , in certain cases, offer an alternative to tooth extraction.

In addition to her husband, Dr. Izar has three other animals. A dog named Griffin, a cat named Daisy, and a bearded dragon that sometimes responds to the name Athena. Griffin, an Australian cattle dog mix, is an awesome running partner and sometimes he gets to hang out at the office. Daisy, a self-proclaimed couch potato, rarely leaves the comfort of her bed.

Dr. Gabriel Stein


Dr. Gabriel Stein has been caring for animals since he was teenager, when he began working in his father’s veterinary hospital in Brooklyn, NY.  He graduated from the University of Glasgow School of Veterinary Medicine in 2011, and has been a veterinarian in Bergen County ever since.

Dr. Stein is particularly interested in Internal Medicine and Emergency Care, and brings a wealth of experience to Allendale Veterinary Hospital.

Dr. Stein and his wife live in Bergen county with their two Devon Rex cats.  Dr. Stein has a true passion for travel, has visited dozens of countries, and is looking forward to an upcoming trip to Bali.

Dr. Brian MacNamara

B_Macnamara Photo.png

Dr. Brian MacNamara grew up on Manhattan’s Upper West Side. He earned his DVM degree from Cornell University’s College of Veterinary Medicine in 1980, after receiving his BS in Animal Physiology from Cornell in 1976.  He is a licensed veterinarian in the states of New Jersey, Pennsylvania, New York, Maryland, and Delaware, as well as in the United Kingdom and Ireland.

Dr. MacNamara brings over 30 years veterinary experience and skill to Allendale Veterinary Hospital. His entire career has been dedicated to the care and treatment of animals.  Dr. MacNamara particularly enjoys Internal Medicine and soft tissue surgery.  

When not caring for animals, he enjoys riding horses, flying and traveling. He and his wife, Laura, have several horses, dogs, cats, and macaws at home. They are the proud parents of two sons, Sean and Brendan.