Our Practice

At Cross Timbers Animal Medical Center we believe in providing up-to-date medical care with compassion to pets and their people... because pets are family, too! We are passionately dedicated to achieving excellence in this goal for each and every animal companion entrusted to our care. We make these promises as if your pet were our own because we understand the special bond that you share. In addition to treating each special patient with the highest level of medical standards and compassion, Cross Timbers Animal Medical Center has an in-house pharmacy, extensive on-site laboratory, radiology, and surgical facilities, allowing our clients to make one stop for their pet's medical care. We look forward to meeting you and your beloved animal companion, and enjoying many happy, healthy years with you in our family!

  • Dr. John Harvey


    Dr. Harvey was born in Metairie, Louisiana. He received his degree from the University of Florida College of Veterinary Medicine in 1998. Dr. Harvey began his veterinary career in the U.S. Army, serving as Chief Veterinarian at Redstone Arsenal in Huntsville, Alabama. He then joined a small animal hospital in 2001, serving as Associate Veterinarian, in Lake Mary, Florida.

    Dr. Harvey and his wife, Christine, excitedly discovered beautiful Flower Mound after a long search. They purchased Cross Timbers Animal Medical Center (formerly Aladdin Animal Hospital) to realize Dr. Harvey’s dream of practice ownership. Each and every day, the primary goal of Dr. Harvey and his staff at CT-AMC is to provide the most personalized and highest quality health care to each pet in our animal hospital family!

    In addition to the practice, Flower Mound is exactly the community that the Harveys were seeking to put down strong family roots for years to come. Dr. Harvey and Christine have three children. There have been many pet family members through the years; including, beloved Rogue and Smokey, the couple’s college cats; sweet Casey Dog, a black and tan coonhound adopted from Redstone in Alabama; and many rescue animals that completed the family.

    Currently, the family is blessed with lots of unconditional love from O’hana, a sweet and beautiful mixed breed dog from Coppell Humane Society, and Daphne, an amazing Pyrenees dog and true companion to O’hana and the Harvey family, from SPIN (Saving Pyrs in Need).

    When not taking care of our furry friends at Cross Timbers AMC, Dr. Harvey enjoys spending time with his family, golfing, hiking, reading and college football (Go Gators!). Dr. Harvey is also active in the community in the following ways:
    On Board of Directors, Flower Mound Animal Control
    On Board of Directors, Flower Mound Emergency Pet Hospital
    Member, American Veterinary Medical Association
    Member, Texas Veterinary Medical Association
    Den Leader for his son’s Cub Scout Pack
    Committee Chairman for the Cub Scout Pack
    Active Member of the WATCH D.O.G.S Program at Heritage Elementary and McAuliffe Elementary where his children attend school

  • Dr. Dena Hartley-Lock


    Dr. Lock was born in Minnesota and while growing up, lived in Michigan, Wisconsin, Nevada, Texas and Tennessee.  She received her Bachelor’s degree in Animal Science from the University of Nevada, Reno.  She then worked in the veterinary field as a technician for 4 years while applying to veterinary school.  She received her Doctor of Veterinary Medicine degree from the University of Tennessee, Knoxville. Her love of college football and the Tennessee Volunteers began here!  During her time at Tennessee, she also realized her affinity for feline medicine and was the president of the student chapter of the American Association of Feline Practitioners for 2 years.

    After graduation, she worked for a nationally recognized feline practitioner for 2 years before joining Cross Timbers Animal Medical Center in 2004.  She truly enjoys that this has allowed the diversity of getting to work with dogs, in addition to being able to continue her passion for cats.  She is proud of the fact that Cross Timbers became a fear-free certified hospital in 2018.  The entire staff works hard to provide a stress-free environment for all pets that have the pleasure of caring for.  A future goal is to become ABVP certified in feline medicine.  She is USDA accredited and has experience in international pet travel and helping clients who are traveling or moving overseas with their pets.

    Dena and her husband, Bevin were married in 2006 and in 2011, they had their daughter Zealyn and in 2012, their daughter Tinzley.  The girls keep them active with gymnastics classes and they love attending Adkins Elementary in Lantana where they also reside.  The family loves to travel and they find as much time as possible to go to New Zealand where Bevin’s family lives and he grew up.  They share their home with multiple felines and their dog, Peyton (yes, as in Manning).

    Dr. Lock loves working with and getting to know patients and clients and forming bonds with them.  She considers her clients and the staff at CTAMC her extended family.

    Member, American Association of Feline Practitioners

    Member, American Veterinary Medical Association

    Member, Texas Veterinary Medical Association

  • Dr. Al Arca


    Dr. Al Arca has been with Cross Timbers Animal Medical Center since 2016 as a relief veterinarian.  He graduated with his Doctorate in Veterinary Medicine in 1988 from Texas A&M University.  Dr. Arca has been working as a relief veterinarian in the DFW area for over 14 years!  We are proud to have him with us on most Tuesdays throughout the year and on some Saturdays as his schedule allows.

    Dr. Arca is married to Dr. Sandra Arca, a pediatrician with Cook’s Children Network.  They have three amazing daughters who are following in their parents’ footsteps attending school at Texas A&M University.  The Arca Family includes 2 dogs and 2 cats.  When Dr. Arca is not taking care of his patients, he enjoys jogging, genealogy, reading and keeping up with his kids and furry friends.

  • Evangeline

    Practice Manager

    Evangeline joined our team in August of 2012 and is our clinic’s Office Manager. She graduated from the University of Georgia in 1993 and obtained her Bachelor’s in Business Administration.  Though she is fond of all furry friends, she has a special love for dachshunds.  At the current moment, she has one lovely dachshund, a mastiff and bloodhound mix, and to round off her furry family she has an adorable white kitten.  Evangeline enjoys spending her free time with her husband and four children.

  • Leslie

    Reception Manager

    Leslie is our Reception Manager.  She started with the clinic in March of 2014.  Leslie has over 20 years of experience in the veterinary field.  Her four adorable Pugs and her lovable Chiweenie are her current passion.  She enjoys doing rescue and helping pets in need. Her family and church are extremely important to her.

  • Audrey


    Audrey became one of our amazing receptionists in October of 2017.  She is originally from Chicago, Illinois.  Audrey has a wonderful husband and son.  She has over 3 years of experience in the veterinary field. Audrey enjoys spending time with her family, cooking, and painting.  She also loves spending time with her 4 dogs, Annie, Baby Gill, Lotso, Tebow.

  • Kasey


  • Heather

    Technician Manager

    Heather joined Cross Timber Animal Medical Center in 2006 and is our expert Veterinary Technician Manager. Heather has been in the Veterinary field for over 14 years and enjoys taking exceptional care of all the patients that are a part of the Cross Timbers family. She is currently going to school to become a Licensed Veterinary Technician.

  • Bridget

    Certified Vet Technician

    Bridget McGraw has been with us since December of 2015. She brings almost 10 years of experience with her and we are lucky to have her! She graduated from and received her RVT from the renowned Bel-Rea Veterinary Technician Training Program in Denver, Colorado in 2010. She is originally from the Chicago area and moved to Texas in 2007. Bridget has 5 dogs: Sophie, Izzy, Cosmo, Bella and Hester as well as a parakeet named Sunny. Outside of work, Bridget loves to read and watch TV. She likes going on long walks with her dogs. She has also found baking to be therapeutic.

  • Abby

    Vet Tech Assistant

  • Danielle

    Client Service Specialist

  • Bailey

    Kennel Assistant

  • Shelby

    Kennel Assistant