Meet Our Staff

At Harts Animal Hospital, we have a dedicated veterinary team that works hard to provide the best veterinary care available. Our team loves animals and promises to treat our patients as though they are our own pets. Our veterinary team includes:


Dr. Hart, DVM

Dr. Rebecca Hart has worked at Hart’s Animal Hospital since 1997 when she purchased the practice. She is a graduate from The Ohio State University for both BS and DVM and has been in the industry since 1988. She has special interest in surgery and oncology and has helped many cancer patients live long lives in remission.

Rebecca has 5 cats and one dog who she loves very much. She is from Cleveland, Ohio and her hobbies include, shopping, home repairs, gardening and long walks with her dog, Eilish.


Dr. Grguric, DVM, MS

Dr. Grguric at a very young age decided he would like to become a vet and made that a reality when he graduated from The Ohio State University College of Veterinary Medicine in 2003. He also completed his Master’s Degree in Physiology at The University of Akron where he focused his studies on the breathing techniques of snakes and his research is now published.

In 2006 with his wife and children, he moved to Arizona where he was given an opportunity to work as a director of an Emergency Hospital. While he was there he was nominated and won “Doctor of the Year”, two years in a row.

In 2009 he won the prestigious AAHA-Leadership Award for his commitment to leadership in the veterinary profession and his community. This award is only given to one person at a national level.

Dr. Grguric and his wife collectively decided to move back to Ohio in 2010 and purchased Valley Animal Hospital and Hart’s Animal Hospital. He also is the owner of Animal Emergency Hospital in Burton, Michigan where he is able to be involved in ER medicine which he has much interest in.

His hobbies include cheering on Ohio sports teams and spending time with wife and three children.


Dr. Lang, DVM

Dr. Robert Lang grew up in Lorain, Ohio and fostered a love for animals at a very early age. After graduating from Lorain Admiral King High School he earned his Bachelor of Science and Doctorate of Veterinary Medicine from The Ohio State University. Dr. Lang previously spent 3 years working at a small animal practice in central Ohio before joining Hart’s Animal Hospital in December 2011. He enjoys all aspects of veterinary medicine, but has a special interest in surgery, internal medicine, and dentistry. Dr. Lang is a USDA accredited veterinarian and a member of the Ohio Veterinary Medical Association (OVMA) and American Veterinary Medical Association (AVMA). When not in the office Dr. Lang enjoys golfing, fishing, the Cleveland sports scene, and spending time with his Doberman, named Baron. Dr. Lang looks forward to meeting all the wonderful pets and “pet parents” in the greater North Royalton area.


Dr. Slawienski

Dr. Slawienski is a native of Buffalo, New York. He received his Bachelor of Science degree in Animal Science from Cornell University and his Doctor of Veterinary Medicine degree from Iowa State University in 1992. He completed an internship in small animal medicine and surgery at West Los Angeles Animal Hospital and trained as a resident in veterinary surgeon at the prestigious Animal Medical Center in New York City. He became a Diplomate of the American College of Veterinary Surgeons in 1999. Dr. Mike practiced at Associated Veterinary Specialists in St. Louis before moving to Ohio with his family in 2004. He has provided soft tissue, neurologic and orthopedic specialty surgeries for patients of veterinary hospitals in Northeast Ohio and surrounding areas since that time. Dr. Mike is an avid homebrewer and as a BJCP certified judge has judged beer competitions nationally and abroad. Dr. Mike enjoys spending time with his wife and his three wonderful and busy young children. Dr. Slawienski has a sweet one-eyed pug named Boty and a very mischievous cat named Shadow.


Dr. John L. Owen

Dr. Owen is a native of the Akron, Ohio area and attended Akron Firestone High School (class of 1987). After high school he joined the United States Army and served during Desert Storm winning a National Defense Service Ribbon and an honorable discharge. He attended Mount Union College from 1990 – 1994, receiving academic All American honors on Mount Union’s first Division 3 national football championship team. Dr. Owen graduated from Ohio State’s College of Veterinary Medicine in 2003. After beginning practice at Viking Community Animal Hospital in North Canton with his father, Dr. Terry Owen, he practiced 3 years at Animal Charity of Ohio in Youngstown. In 2007 he began Howland Community Animal Hospital and has been there since. It is a hospital with a heavy concentration on orthopedic and soft tissue surgery, especially knee surgery and surgery of the upper airway of the canine and feline.