Our Practice

We are a full-service animal hospital providing comprehensive pet healthcare services in Flower Mound, 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 Grapevine, Lewisville, Bartonville, Highland Village, & Coppell.

  • 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.

  • Meghan

    Practice Manager

    Meghan has been in the veterinary field for eight years and has worked at Premier Vet Care Animal Clinic in Rowlett, TX since the clinic first opened its doors in 2015. She and her husband recently moved to Fort Worth, Texas with their German shorthaired pointer, Morty, and their cattle dog, Lacey. Meghan can always be seen with a coffee in hand and enjoys traveling (hiking in Colorado is the current favorite travel spot) and attending concerts (pre-COVID) in her free time.

  • Audrey

    Client Service Specialist

    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

    Client Service Specialist

    Kasey became one of our amazing receptionists in September of 2019. She was born and raised in Dallas, Texas; a true Texan! She has worked with animals since 2012. She has 2 dogs a black Golden Retriever named Blossom and a tri-colored Corgi named Ranger (Go Texas Rangers!) Her hobbies include spending time with her family and her dogs, and she enjoys watching Texas sports teams.

  • Danielle

    Client Service Specialist

    I started with Cross Timbers on August 3, 2020. I was born and raised in Texas and went to Amon Carter/Riverside Highschool. I have three pets. 2 dogs and 1 cat, but my mother keeps stealing my little dog. I have been in customer service for 30 years in some way, shape, or form. I have worked in this field for 5 years and I love my job! Just a heads up, your pet will be spoiled by me when it comes to our clinic. I cannot keep from giving cuddles to any pet that comes through our door. If I can get away with it, I will steal all the cuddles I can get.

  • 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

    Abby initially joined the Cross Timbers family in 2018 as a Kennel Assistant and has been working with our team as a Veterinary Technician Assistant since October 2019. She grew up right here in Flower Mound, graduated from Oklahoma State University with her B.S. in Zoology in 2017, and is currently attending Dallas College’s Veterinary Technology program in pursuit of becoming a credentialed Veterinary Technician. With previous experience in wildlife research, raptor husbandry, as well as domestic animal care including Fear Free and Cat Friendly certification, Abby loves getting to know and help take care of all our furry friends at Cross Timbers! In her free time, she enjoys sketching, getting outdoors, and spending time at home with her own two pups, Picnic and Sadie.

  • Carolina

    Vet Tech Assistant

    Hi, I’m Carolina and I started working at Cross Timbers November 9, 2020. I am currently going to Cedar Valley for its Veterinary Technician program. I have two dogs and a cat who I love very much. I like to dance, sing, trying new places to eat, and watch anime on my days off.

  • Bailey

    Kennel Assistant

    Bailey joined the Cross Timbers Animal Medical Center Team in September 2020. Bailey loves animals of all kinds she and her family have a total of 4 dogs, 5 cats, and a snake. She enjoys baking and likes to bring in baked goods for the clinic