Since 1973, Triangle Animal Clinic has been serving the veterinary needs of Conroe, Magnolia, The Woodlands, and Montgomery County. Triangle Animal Clinic is a full-service, state-of-the-art, small animal veterinary hospital committed to achieving high standards of excellence in progressive veterinary medicine. In 2020, Dr Rainer became managing owner of Triangle.

Our professional and friendly staff is committed to providing your pets with the best possible medical care topped with an exceptional client service experience. Triangle Animal Clinic prides itself on promoting responsible pet ownership, preventative health care, as well as health-related educational opportunities for our clients.

When you want the best veterinary care for your furry family members, come to the professionals at Triangle Animal Clinic!

Leadership Team


Managing Owner

From the town of Temple, the Wildflower Capital of Texas, Dr. Rainer is the leader of the practice, preserving Dr. Hadash’s 40+ year legacy. ‘Keeping veterinary ownership in the hands of veterinarians is incredibly important for our clients and their fur-babies, and I look forward to making a positive impact in our community.’

Dr. Rainer, born and raised in Temple, Texas, is married to Laurin and has two children, Adriel and Jace. They have two dogs, Gilly and Frankie; three cats, Gracie, Janet, and Boogie; and beef cattle. Dr. Rainer is an avid sports fan and enjoys all things Aggie while spending time with his family.

Dr. Aaron Rainer received his undergraduate degree in Biomedical Science in December 1998. He received a dual degree as a Master of Public Health and Doctor of Veterinary Medicine from Texas A&M University in May 2006.

He has strong interests in preventive medicine, internal medicine, surgery, mentorship, leadership, and entrepreneurship.

Dr. Rainer is the co-founder of Animal Emergency Center of Temple-Belton™ and Gig™, an innovative veterinary staffing concept. He also owns Fetch™ by Dr. Rainer, a mentorship and consulting platform for veterinarians and staff.

Dr. Rainer has held several professional leadership positions in the last decade, including the 2018 President of the Texas Veterinary Medical Association (TVMA) and its 4,400+ members and 4,000+ non-members. He remains the youngest president in the over 100 year storied history of TVMA. Dr. Rainer continues to play a vital role in developing, shaping, and implementing the strategic direction of veterinary medicine in Texas.

Professional highlight:

• 2008 Recent Graduate Practitioner of the Year

Other career achievements:

• 2014 12-Under-12 Young Alumni Spotlight (Texas A&M University)

• 2014 Rising Star Award (Texas A&M College of Veterinary Medicine)

• 2010 Emerging Leader Award (American Veterinary Medical Association)

• 2006 Buck Weirus Spirit Award (Texas A&M University) 

Stephanie Ellis, LVT

Practice Manager

Growing up in a small town in Oklahoma, Stephanie experienced triumphs and heartbreaks with her dogs, cats, and horses in her younger years. ‘Veterinary medicine was very different when I was a kid, advances in diagnostics and pharmaceuticals have made our field so exciting. I’ve always been a fixer, so what better way to serve my fuzzy friends than to be a part of the fix.’

Stephanie graduated from Murray State College in Oklahoma, with an Associates of Applied Science in Veterinary Technology in 1995. From that point, she began trailblazing her interesting career path in the pet care industry.

Prior to joining the Triangle Animal Clinic team in 2014, Stephanie practiced as a Lead Registered Veterinary Technician for a progressive small animal clinic in River Oaks for three years. Seeking more leadership duties and responsibilities, she was turned towards an opportunity to lead teams and provide excellent pet care. She spent the next sixteen years in various management roles from the general manager, area veterinary hospital administration, and district manager, with a nationwide pet care company. During her tenure with this company, she had the opportunity to work with a number of superior mentors, who helped develop and polish her leadership capabilities and skills, ranging from operations management and client services to business management and human resources.

Her favorite thing about being at Triangle Animal Clinic is leading the team and sharing our unified passion for providing the absolute best veterinary care to our patients, coupled with an excellent client experience.

In her free time, Stephanie enjoys spending time with her family and friends, home repair projects, auto repair, boating, biking, and hiking.

Our Doctors

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We strive to give pets the longest and happiest life with the people that love them.

Get the best care for your best friend.

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