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William Flannery DVM
Owner of
The Greatful Pet
Animal Clinic
Kathi Flannery
Clinic Manager

Dr. William R. Flannery has been providing veterinary care for over 15 years in the Henderson, and Boulder City areas.  Originally from Enon, Ohio, Dr. Flannery attended California University of Pennsylvania from 1991 to 1993 while playing on their basketball team. 

Unfortunately his basketball career was cut short due to an unforseen diagnosis of a bone tumor in his ankle.  After taking a short break from school while healing from his surgery he returned to school. Dr. Flannery received a Dual Major Bachelor’s Degree in Chemistry and Biology at Wright State University in Dayton, Ohio in 1997.  He received his Doctor of Veterinary Medicine at The Ohio State University College of Veterinary Medicine in 2001.  After 7 years of working as an Associate Veterinarian he was able to complete his dream of opening his own practice, The Greatful Pet Animal Clinic in 2009.  Dr. Flannery has always had a special interest in surgery, orthopedics, and internal medicine. 

In his free time he enjoys spending time with his family and pets, listening to music, watching movies, gardening, cooking, and fishing. 

Kathi Flannery opened The Greatful Pet Animal Clinic along side her husband Dr. William Flannery in 2009.  She has always had a special connection with all animals, and has always wanted to help in the best way possible. It is her goal to make sure that every pet has the best experience possible while in our care. Kathi follows her passion working with animals. She continues to provide The Greatful Pet Animal Clinic with undimensional support for her employees, clients and patients.


Dominic Cacioppo DVM

Dr. Dominic Cacioppo is a graduate of the University of Missouri-Columbia class of ‘87. He moved to Las Vegas right after graduation. After working and managing at a couple practices in town, he opened Park Animal Hospital in 1991. There he owned and managed that practice until he sold it in March 2022. In July 2022 he joined the team at Greatful Pet.
Dr. Cacioppo works on a variety of species of pets, not just dogs and cat. He has been a long standing member of the Association of Avian Veterinarians, Association of Small Mammal Veterinarians and Associations of Reptile and Amphibian Veterinarians. He enjoys seeing all types of different species of patients (except pot belly pigs and primates).
As hobbies, he has had a large breeding flock of all different parrot species, was a falconer for 17 years and currently grows multiple species of coral in his salt water aquariums. He also enjoys travel overseas and wildlife photography.

Our Mission

Here at The Greatful Pet Animal Clinic, we strive to provide the best care possible.  We consider ourselves family here, and our clients and patients are an extension of that family.  We will always provide compassion and honesty in our practice.  The Greatful Pet Animal Clinic strives on the ability to save lives, and to provide support for extending your pets life.  We will always hold your pets best interest above all else.   

Our Doctors
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