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Green Glen Equine Hospital is staffed with a talented and diverse group of equine veterinarians.

Wade A. Wisner, VMD.

Dr. Wade Wisner was raised with his two brothers at the farm where the hospital is located. The family has strong ties to thoroughbred racing and breeding.  Growing up he was active in pony club and would often spend time with his father on calls or in surgery. 

Dr. Wisner received his undergraduate degree in Animal Science from the University of Delaware and went on to graduate from the University Of Pennsylvania School Of Veterinary Medicine in 1992.  During his time at New Bolton Center he spent extra time studying sports medicine.  After vet school he came to work for his father and Dr. McCubbin at Green Glen Equine Hospital. Within veterinary medicine, he has developed a strong interest in Sport Horse Medicine and Surgery as well as lameness and acupuncture.  He enjoys the variety that every day brings from treating foals and breeding mares to corrective dental procedures. 

He took over the hospital in 2002 when his father, Dr. Allen Wisner, retired.

When Dr. Wisner is not working he enjoys fishing and spending time with his wife and two children.

Mark E. McCubbin, DVM.

Dr. Mark McCubbin received his BS from Pennsylvania State University in 1973. After graduating he continued his veterinary studies at the University of Georgia College of Veterinary Medicine and graduated Magna Cum Laude in 1977. 

Dr. McCubbin is retired.


Jennifer L. (Karl) Hayes, DVM

Dr. Jennifer Hayes grew up with horses in Northern Ohio.  She was very active in 4-H and competed at the national level in horse judging, horse bowl, and hippology contests.  Dr. Hayes also devoted a lot of time to showing and competition with her horses.  She attended the University of Findlay for her undergraduate education and pursued a dual major in Biology and Western Equestrian Studies.  Dr. Hayes then attended The Ohio State University for veterinary school.  During her professional career, she has worked for equine veterinary practices in Pennsylvania and Ohio.  Dr. Hayes’ professional interests include lameness, laminitis rehabilitation, dentistry, and reproduction.  She also places a strong emphasis on preventative medicine and a whole-horse approach to care to help horses and their humans.  In her free time, Dr. Hayes enjoys trail riding with her husband, Greg, and spending time with her own horses and dog.

Chase Whitfield, DVM, MS, DACVS
Board Certified Surgeon

From a small town in Oklahoma, Chase attended undergraduate and veterinary school at Oklahoma State University. Following veterinary school he completed a one-year rotating internship at Weatherford Equine Medical Center in Weatherford, TX. He then went on to complete a three-year Equine Surgery Residency at Oklahoma State University. He then stayed on faculty at Oklahoma State University for one year as a large animal emergency clinician. Chase passed the rigorous surgery board examination in 2016 and became a board certified large animal surgeon. For the past 2 years he has worked in Texas as a staff surgeon at Weatherford Equine Medical Center. In his free time he enjoys spending time outdoors with his fiancé, Angela and their Labrador retriever, Lennon.

Dr. Corie England, DVM

Dr. England grew up in Southwest Iowa, attending Iowa State University and graduating with her Doctor of Veterinary Medicine in 2003. She has traveled around the country living in the Northeast, Midwest, and Northwest parts of the United States. She has also gained experience in equine medicine and reproduction down under, spending time in New Zealand and Australia. Her areas of focus are general equine ambulatory medicine and reproduction including mare management and neonatal foal care. Dr. England enjoys spending time traveling, visiting friends and family, and cuddling with her two dogs.

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