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) 

Heather Klumpp

Heather Klumpp, LVT

Practice Manager

Heather was born in Bryan, Texas and moved to the Conroe area in first grade.  Heather’s love of animals comes from her mom, who made sure that as an only child, Heather always had a furry (or scaly) friend (or friends) at home to play with. Heather started her career in veterinary medicine in 2005 as a kennel technician at a mixed animal practice in Conroe. From there she advanced to a veterinary assistant role and then decided to make it official and become a Licensed Veterinary Technician. Heather graduated with a 4.0 GPA from The Vet Tech Institute of Houston with an Associate’s Degree in Applied Science- Veterinary Technology and quickly passed her licensing Board Exams.   After Graduation Heather went to work in the Critical Care Unit at Gulf Coast Veterinary Specialists where she was promoted to a Multi-departmental Supervisor.  While at GCVS Heather’s family grew by 4 feet! She had 2 sons, Mikal and Nolan. After Nolan was born Heather knew she wanted to work closer to home, here in Conroe.  Heather Joined the team here at Triangle in 2021 as a Technician and moved into the position of Hospital Administrator in 2023. She has since obtained her GlobalFAST Ultrasound Certification and been invited back as an assistant instructor for the GlobalFAST program, she is a published CE author and presenter, she spearheaded Triangles AAHA Accreditation earning our credentials on first inspection and is currently working on her Veterinary Technician Specialty in Clinical Practice. She lives a home with Huckleberry the Greman Shepherd, Tatum the Labradoodle, Lup the Australian Cattle Dog, her 2 cats Mjolnir and Nilva, her Husband Jason and their 2 children. 

Heather’s favorite things about being at Triangle are the staff and the high caliber medicine that is practiced.  

” I know coming in to work, its going the be a good day. We have the best staff and Doctors in the business. I know every one of our patients are going to be related like our own and receive only the best care”.

In her free time Heather enjoys spending time with her friends and family. 

Our Doctors

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

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