Our Practice

We are a full-service animal hospital providing comprehensive pet healthcare services in Plano, TX. Our veterinarians offer a wide variety of medical, surgical, and dental services. Our hospital has advanced equipment and technologies, including comprehensive in-house testing for accurate diagnosis, digital x-ray, surgical suites, dental suites, and a pharmacy. We are committed to providing quality care at every stage of your pet's life. From routine preventive care to early detection and treatment of a wide range of conditions and diseases, we have the expertise to provide the highest standard of care for your pet. We also serve Allen, Mckinney, Parker, Fairview, and Hunters Glen.

  • David Cinclair, DVM


    Dr. Cinclair grew up in Plano and graduated from Plano Senior High School in 1987. A trio of very special Cairn Terriers and a love for animals were his inspiration to go to Texas A&M in pursuit of becoming a veterinarian. He attended Texas A&M and graduated magna cum laude in veterinary science. He also attended Veterinary School at Texas A&M and graduated magna cum laude in 1994. Dr. Cinclair moved to Frisco in 1994, and began practicing small animal medicine with an established and well-respected Plano practice. In 1999, he left the group and established Custer McDermott Animal Hospital in the West Allen/North Plano area, where he continues to practice today. Special interests include dentistry and dermatology.

    Dr. Cinclair is a member of the Texas Veterinary Medical Association and the American Veterinary Medical Association. He is also an active member of the Texas Academy of Veterinary Practice, an organization whose members strive for excellence through participation in a high level of continuing education seminars and labs. Dr. Cinclair enjoys and appreciates the opportunity his profession allows him to work with and care for dogs and cats, and to establish relationships with his clients. Dr. Cinclair and his wife Becky moved back to Plano in 2001. The Cinclairs have been blessed with four wonderful children, two Cairn terriers, and a cat. Outside of work, Dr. Cinclair enjoys spending time with his family, the outdoors, and following local sports teams.

  • David Pilkington, DVM


    Dr. Pilkington is a 1998 graduate of Texas A&M’s College of Veterinary Medicine. He knew he was destined to be a veterinarian after winning a cow milking contest in the first grade. While his career started with food animals, he is now happy to practice companion animal medicine. Dr. Pilkington moved from Connecticut to Texas in 1979, and became friends with Dr. Cinclair and his family shortly thereafter. He now lives in Plano with his wife Susan, their four children (Chandler, Bennett, Dorrie Beth, and Anne Marie), as well as their hairier children: Cotton, a DSH cat, and Penny, a King Charles Cavalier Spaniel (their newest addition).

    When not practicing medicine or volunteering, Dr. Pilkington enjoys spending time with his family, playing softball, various outdoor activities, and often to his demise, cheering for the Aggies. He is also very involved with men’s groups and youth education at his church in Plano. He is very excited to practice veterinary medicine not only with an esteemed colleague, but a good friend. Dr. Pilkington believes veterinary medicine is about helping pets, and people too. He is dedicated to strengthening the human-animal bond.

  • Alexandra Brewer, DVM CVMA


    Dr. Brewer is native to southeast Louisiana, where she attended LSU for both her undergraduate studies and veterinary school. Following graduation in 2007, she lived in various areas of the country, including Las Vegas and Charlotte, NC, before settling down in Texas.  She joined our practice in 2015 and has really enjoyed getting to know our clients and their pets. Recently, she earned her certification in veterinary medical acupuncture and is now offering that service.  She also enjoys preventative and geriatric care, internal medicine, and dermatology.

    Dr. Brewer and her husband Jason have two young children, and they enjoy exploring the north Texas area. She also shares her home with a yellow Lab named Benny (Dr. Brewer’s first baby), and a Pug mix named Mattie.

  • Meredith Brassette, DVM


    Dr. Meredith Brassette joined the Custer McDermott Animal Hospital team as a general practitioner in June 2022 after practicing in Flower Mound and McKinney since 2013. She is originally from Lake Charles, LA, and graduated from Louisiana State University with bachelor’s degrees in both animal science and psychology in 2009. She went on to earn her Doctorate of Veterinary Medicine from the LSU School of Veterinary Medicine in 2013. Her professional interests include dermatology, internal medicine, and surgery. She is a member of the American Veterinary Medical Association and the Collin County Veterinary Medical Association.

    Dr. Brassette shares her home with her husband, Kevin, who is a mechanical engineer, and their two children. They also have three pets, Edgar (domestic shorthair cat), Bronwyn (Welsh Corgi), and Sadie (Border Collie mix). In her free time, she enjoys spending time with family, cheering on the Dallas Stars, and watching LSU football(Geaux Tigers!). She also enjoys baking, watching the Great British Bake Off, and sampling any and all baked goods. 

  • Michael Demmin, DVM


    Dr. Demmin is originally from Plano, Texas and worked at Custer McDermott Animal Hospital from 2016 through 2018 as a veterinary assistant.

    He attended the University of North Texas for his undergraduate degree and went to Kansas State University College of Veterinary Medicine where he graduated in 2022. He enjoys working with cats, dogs, exotic mammals and reptiles.

    At home, Dr. Demmin and his wife enjoy spending time with their 5 dogs (a German Shepherd, German Shepherd/Husky mix, Golden Retriever, Dachshund, and a three-legged Bassett/Husky/Shepherd mix). He also enjoys various hobbies including woodworking, wood carving, video games, playing guitar, and learning new things.

  • Fantasia Ward

    Practice Manager

    Fantasia has worked in the veterinary industry since 2007. During that time, she obtained her Bachelor’s degree in Biology in 2008 from the University of North Texas. She recently graduated with a Master’s in Business Administration from the University of Dallas. Fantasia has 2 cats and 1 dog. In her free time, she enjoys spending time with family and friends.

  • Vickie Kennedy


    Vickie has been a receptionist at Custer McDermott Animal Hospital since September of 2003. From 1989-2000, Vickie lived in Hong Kong, China, and the Philippines. Before moving overseas, Vickie worked 9 years for Myers Financial Corporation in the Land Development department. Currently, she lives in Frisco and enjoys the company of her cats, Callie and Hobbs. In her spare time, Vickie likes to spend time reading, seeing movies and of course spending time with her cats.

  • Bailey Fields

    Veterinary Technician

    Bailey joined the CMAH family in November 2018. Starting in 2014, she worked her way up from a kennel assistant to a technician. She is a mom to 1 dog, 2 cats, and a crafted gecko. In her free time she enjoys playing video games, watching anime, going to conventions, and cosplay.

  • Kim Spitzer

    Veterinary Technician

    Kim Spitzer, a Texas native, joined the Custer McDermott Animal Hospital team in September of 2019. She has been in the veterinary field for over 20 years, which has made her love for animals and their owners grow. She enjoys expanding her knowledge by partaking in continuing education and keeping up to date on ways to improve her technician skills. Kim has a two-and-a-half-year-old whom she loves watching grow, as well as two chihuahuas who take up most of her free time. When she does find a quiet moment, you can find her reading or catching up on her favorite shows.

  • Frances Vaughan


    After raising a family and moving to McKinney in June of 2003, Frances began to pursue a career in the veterinary field. She started out as a receptionist and attended classes to become a registered veterinary technician. With a lifelong love for animals and always having pets as part of her family, the choice was not a hard one to make. Frances joined the Custer McDermott staff in April 2006 as a veterinary technician. Helping clients take care of their pets, which in many cases are like family members, is one of the aspects of veterinary medicine that Frances enjoys the most. In her spare time, she enjoys spending time with her dogs, Polo, Noel, and Ricon. Frances also enjoys fishing, hiking, and trail riding on her Morgan horse, Skeeter.

  • Curstin Williams

    Veterinary Technician

    Curstin has lived in Texas for most her life and she has always had a very big interest in animals since childhood. Wanting to get as much experience as possible in the veterinary world, she took all the classes she could in high school, and completed a 2 year program at a vocational school allowing her to become a Certified Veterinary Assistant. In her spare time she enjoys reading and spending time with her friends and family. She is currently the owner of a schnauzer terrier mix named Bella, however she credits her childhood dog Brownie, a lab mix, for being there for her while she grew up.

  • Jordan Dilks

    Veterinary Technician

    Jordan joined the CMAH family in July 2020. She is currently attending the University of North Texas, pursuing a bachelor’s degree in biology. She is passionate about rescuing animals and giving them the life they deserve. She has 4 dogs, guinea pigs, snakes, hamsters, geckos, rabbits, and chinchillas. In her free time, she enjoys spending time outdoors and exploring nature.

  • Marietta Cowan


    Marietta joined the CMAH family in 2015 when she moved to Texas to be closer to her Grandchildren. She attributes her lifelong love of animals to her grooming career. She apprenticed at a local grooming salon in high school and has groomed in some form ever since. She became an IPG Certified Master Groomer in 2000 and continues to further her career by attending dog shows and grooming events. In her free time Marietta enjoys competing in AKC conformation and obedience events with her Australian Terriers, Addie and Lottie, and her Standard Poodle Jeff.