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Meet Our Veterinarians

Mackenzie Cail, DVM

Mackenzie Cail

From her earliest memories Dr. Cail has had a profound desire to help animals, but it wasn't until she was older that she discovered that medicine is like solving a puzzle.....and she loves puzzles!  

Dr. Cail attended Texas A&M University and received her Doctor of Veterinary Medicine and her Bachelor's Degree.  

Dr. Cail wants all her clients to leave with all questions answered and all the tools necessary to keep their pets healthy and thriving at home.  She believes that her job goes beyond medication, often education and advice is more critical than treatment.

Dr Cail was recently married and together she and her husband are raising their dog, Vail, a Great Pyrenees, and their corn snake, Azrael.  Her hobbies include hiking, art, music and reading (she prefers sci-fi and horror).

Her quote:  "Animals have given so much to me in my life - a model of beauty, an understanding of myself, entertainment, joy, love, trust - I've had a deep desire to help them however I can from my earliest memories."


Patrick Choyce, DVM
Medical Director, Owner

Patrick  Choyce

Dr. Patrick Choyce is a 1983 graduate of the Texas A&M University College of Veterinary Medicine. He also completed his undergraduate studies at Texas A&M in Animal Science. Upon graduation, Dr. Choyce practiced for three years as an associate in small and large animal practices before moving into emergency medicine. After practicing for 5 years in emergency practice and daytime relief practices, Dr. Choyce opened All Pets Animal Hospital on Mason road in March 1990. After 21 years, he moved the practice to the current location and new modern facility on Kingsland Boulevard.

Although his family is from Houston, his dad was a naval aviator, so Dr. Choyce grew up all over the United States. Besides enjoying veterinary medicine as his profession, Dr. Choyce enjoys spending time with his wife Dodie, children, and family. The Choyce's pet family includes a Tuxedo short hair cat "Groucho" and two Burmese cats"Charlise" and "Sky", 2 African grey parrots "Georgie" and "Flatop", an Eclectus parrot "Bailey", and a cockatiel "Lovie". He also cares for foster and rescue dogs including his awesome wheelchair Chihuahua Indy. Dr. Choyce also enjoys working out, cycling the MS 150 tours, camping, backpacking, playing guitar, singing, studying Spanish, participating in youth and mission activities at church, and volunteering for service work to several organizations.

Robert Clipsham, DVM

Robert Clipsham, DVM

Dr. Clipsham graduated from KSU College of  eterinary Medicine with additional training in pathology at Washington State University and avian medicine at the UC Davis Veterinary medical teaching Hospital.  The next 20 years were devoted to developing clinical technicques and protocols for use in nondomestic pet medicine, domestic propagation of endangered species, overseas conservation projects and educational training of student interns and clinicians.  Medical and surgical care was provided for personal pets at his exotics clinic, in addition to field work at private zoos and commercial collections, including the penguin exhibit at SeaWorld San Diego, The Playboy Mansion, Universal Studios and the Neverland Collections. 

Subsequently, Dr. Clipsham went on to further education earning a doctorate in developmental molecular genetics, postdoctoral studies in adult steam cell engineering and an NIH fellowship in pediatric ophthalmology using gene therapy at UCLA.  The past 20 years have been devoted to companion pet care, with strong interests in preventative medicine, pediatrics, internal medicine and immunology. 

Dr. Clipsham is continuously fascinated by cats and puppies of all ages and sizes.  He maintains a strong interest in teaching and has authored over 100 professional publications in addition to lecturing across North America for veterinary and academic groups.  His plan is to become board certified in veterinary practice for dogs and cats.

He is the parent of two Tonkinese sisters.  His wife is an American historian and expects to visit the many historical sites in Texas.

Amanda Fiser, DVM

Amanda Fiser, DVM

          Dr. Amanda Fiser was born in Tyler, Texas, but moved to Atlanta, Georgia when she was 12.  She attended Ross University School of Veterinary Medicine on the island of St. Kitts and completed her clinical year at Auburn University in Alabama.  While at Auburn, she met her husband in the Emergency room of the local hospital.  

After graduating vet school she moved to Houston and has worked at several different animal hospitals.  She currently lives with her husband, a cat named Evander, and a Terrier mix named Scarlett.  Her work interests include rehabilitation and pain management.  Outside of work she enjoys hiking, painting, and running.                                                   

Sarah M. Heineman, DVM

Sarah M.  Heineman

Dr. Sarah Heineman is a 2009 graduate from the Texas A&M University College of Veterinary Medicine and received a Bachelor of Arts degree in Biology from Hendrix College, located in Conway, Arkansas. She worked as a small animal practitioner in San Antonio prior to joining the All Pets Animal Hospital team.

Dr. Heineman is originally from California, but grew up in Humble, Texas. In her free time, she enjoys the beach, live music venues, and dance/musical theater, as well as hiking, camping, exercising, and reading. Dr. Heineman also enjoys spending time with her friends, family, her Italian Greyhound, Giselle, and her blind Shih Tzu, Ray Charles.

Chen Han Lee, DVM

Chen Han Lee

Dr. Chen Han Lee moved to Texas from California.  He graduated from National Ching Hsing University and received his Bachelor of Veterinary Medicine in Taiwan.  He completed a 1 year clinical rotation at Kansas State University prior to obtaining his PAVE certificate.  

Dr. Lee loves taking care of animals because he believes they are "joyful, faithful companions, uniquely and wonderfully made."  His areas of special interest are small animal cardiology, internal medicine, and ultrasoundnography.  He loves All Pets because we provide all the medical support a pet could ever need.  

His family includes his beloved wife and two children.  He has three dogs, and Kai and Harry will always be with the family in spirit.  He enjoys playing piano and basketball, and is looking forward to picking up watercoloring and Legos!

An exceptionally conscientious Dr., who is very passionate about animal care, Dr. Lee would love to take care of your pets!

Gabriela Nieves, DVM

Gabriela  Nieves


Marieta Solé, BVMS

Marieta  Solé

Dr. Solé was born in Argentina but has moved around for much of her life, living in Brazil, New Jersey, Georgia, North Carolina, New York, Scotland and England. She completed her undergraduate studies at Davidson College in North Carolina, receiving a BSc in Biology with a concentration in International Studies. She worked at Columbia University, specializing in cancer research, before attending the University of Glasgow in Scotland to obtain her veterinary degree. She also completed an masters in biodiversity and conservation while there. Dr. Solé worked in a small animal hospital for 2 years in Leeds, England before relocating to Houston.

In her free time, Dr. Solé enjoys spending time with her family, playing and watching soccer, supporting her husband's basketball team, and traveling. Her pet family currently only includes her 'nieces'- corgi crosses Lucy and Lola, but she is looking to expand this with a new puppy soon!

Jaclyn Koch, DVM

Jaclyn Koch

Dr. Jaclyn Koch (pronounced "Coke" - formerly Dr. Zangre) was born and raised on Long Island, New York.  She began her veterinary education at the University of Conneticut, where she earned a Bachelor's degree in Animal Science, which she followed with earning her Doctorate of Veterinary Medicine from the University of Missouri.  Dr. Koch chose to bring her New York accent to Texas for the opportunity to work at such a fast-paced and multi-faceted practice as All Pets Animal Hospital, and to experience the world-renowned "Texan" culture.

As Dr. Koch has an affinity for Emergency and Critical Care and diagnostic imaging, you'll likely find her working All Pets' emergency cases overnight.  She enjoys the pressure of the emergency environment, as well as the opportunity to practice a broad scope of veterinary medicine.

Dr. Koch is a fitness enthusiast, and enjoys activites such as yoga, lifting weights, and distance running.  Since 2012, she has completed 4 full marathons, and many more Netflix marathons - all alongside her husband, Tyler, lemon beagle Anthony, and two tortoises, Weber and the Unbreakable Kimmy Schmit.



What Our Clients Are Saying:

I love it here. The staff is very friendly! We brought our puppy here because she was very ill, and as soon as we brought her home, she was back to normal. Everyone is very professional. This is the place I will continue taking my pets to get their check-ups.
Cindy Hernandez
The staff is wonderful. We trust them implicitly with the care of my babies. We have peace of mind knowing there is always someone on call if ever there is an emergency.
Deana Mangan
Dr. Choyce's expert and professional approach are exceptional. I would recommend All Pets Animal Hospital and its services and personnel to any caring pet owner.
Sara Chadwick
Everyone was excellent! My dog Raleigh was seen immediately and treated kindly. Thank you so much for being so nice to our family!
Stacy Barber